~~UNITED~~Citigroup ~~STATES~~Commercial Mortgage Trust 2017-B1 Commercial Mortgage Pass-Through Certificates, Series 2017-B1 STATEMENT TO NOTEHOLDERS

~~SECURITIES~~November ~~AND~~18, ~~EXCHANGE COMMISSION~~ 2025

Washington, D.C. 20549


TRANSACTION PARTIES


Depositor:	Citigroup Commercial Mortgage Securities Inc.
Master Servicer:	Wells Fargo Bank, National Association
Certificate Administrator:	Citibank, N.A.
Special Servicer:	LNR Partners, LLC
Trustee / Custodian:	Deutsche Bank Trust Company Americas
Asset Representations Reviewer /
	BellOak, LLC
Operating Advisor:




	Danny Lee	Citibank, Agency and Trust
	(212) 816-4936	388 Greenwich Street Trading, 4th Floor
danny1.lee@citi.com		New York, NY 10013

FORM 10-D


TABLE OF CONTENTS


1	.	Distribution Summary	2
1.1	.	Summary	2
1.2	.	Factors	3
2	.	Distribution Detail	4
2.1	.	Interest Detail	4
2.2	.	Interest Shortfall Detail	5
2.3	.	Principal Detail	6
3	.	Reconciliation Detail	7
4	.	Other Information	8
5	.	Stratification Detail	9
6	.	Mortgage Loan Detail	14
7	.	NOI Detail	16
8	.	Delinquency Loan Detail	18
9	.	Collateral Performance Delinquency and Loan Status Detail	19
10	.	Appraisal Reduction Detail	20
11	.	Historical Appraisal Reduction Detail	21
12	.	Loan Modification Detail	24
13	.	Historical Loan Modification Detail	25
14	.	Specially Serviced Loan Detail	31
15	.	Historical Specially Serviced Loan Detail	32
16	.	Unscheduled Principal Detail	37
17	.	Historical Unscheduled Principal Detail	38
18	.	Liquidated Loan Detail	39
19	.	Historical Liquidated Loan Detail	40
20	.	CREFC Investor Reporting Package Legends	41
21	.	Notes	42

~~DISTRIBUTION~~Citigroup ~~REPORT~~Commercial ~~PURSUANT~~Mortgage TOTrust ~~SECTION~~2017-B1 13Commercial ORMortgage ~~15(d)~~Pass-Through OFCertificates, Series 2017-B1 DISTRIBUTION SUMMARY

~~THE~~November ~~SECURITIES~~18, ~~EXCHANGE ACT OF 1934~~ 2025

For the monthly distribution period from:


											Accretion
											&
											Non-Cash
					Accrual		Other				Balance
	Original	Prior	Pass-Through		Day	Interest	(As Interest)	Principal	Total	Realized Loss	Increase/		Current
Class	Balance	Balance	Rate		Count	Distributed	Distributed	Distributed	Distributed	/(Recovery)	(Decrease)		Balance

A-1	21,308,000.00	-	2.008000	%	30/360	-	-	-	-	-	-		-
A-2	52,843,000.00	-	3.053000	%	30/360	-	-	-	-	-	-		-
A-3	245,000,000.00	233,140,098.46	3.197000	%	30/360	621,124.08	-	-	621,124.08	-	-		233,140,098.46
A-4	268,110,000.00	268,110,000.00	3.458000	%	30/360	772,603.65	-	-	772,603.65	-	-		268,110,000.00
A-AB	38,890,000.00	12,407,811.23	3.243000	%	30/360	33,532.11	-	597,702.77	631,234.88	-	-		11,810,108.46
A-S	89,450,000.00	89,450,000.00	3.711000	%	30/360	276,624.12	-	-	276,624.12	-	-		89,450,000.00
B	38,016,000.00	38,016,000.00	3.963000	%	30/360	125,547.84	-	-	125,547.84	-	-		38,016,000.00
C	36,899,000.00	36,899,000.00	4.238748	%	30/360	130,337.98	-	-	130,337.98	-	-		36,899,000.00
D	41,370,000.00	41,370,000.00	3.000000	%	30/360	103,425.00	-	-	103,425.00	-	-		41,370,000.00
E	21,245,000.00	21,245,000.00	3.300000	%	30/360	120,669.56	-	-	120,669.56	-	-		21,245,000.00
F	8,945,000.00	8,945,000.00	3.300000	%	30/360	-	-	-	-	-	-		8,945,000.00
G	8,945,000.00	8,945,000.00	3.300000	%	30/360	-	-	-	-	-	-		8,945,000.00
H	23,481,024.00	20,987,913.95	3.300000	%	30/360	-	-	-	-	-	-		20,987,913.95
R	-	-	0.000000	%	30/360	-	-	-	-	-	-		-
VRR	47,079,054.00	41,027,148.67	0.000000	%	30/360	142,568.83	-	31,458.04	174,026.87	-	-		40,995,690.63
Total	941,581,078.00	820,542,972.31				2,326,433.17	-	629,160.81	2,955,593.98	-	-		819,913,811.50
Notional
X-A	715,601,000.00	603,107,909.69	0.848541	%	30/360	426,468.24	-	-	426,468.24	-	(597,702.77	)	602,510,206.92
X-B	38,016,000.00	38,016,000.00	0.275748	%	30/360	8,735.71	-	-	8,735.71	-	-		38,016,000.00
X-D	41,370,000.00	41,370,000.00	1.238748	%	30/360	42,705.85	-	-	42,705.85	-	-		41,370,000.00
X-E	21,245,000.00	21,245,000.00	0.938748	%	30/360	16,619.76	-	-	16,619.76	-	-		21,245,000.00
X-F	17,890,000.00	17,890,000.00	0.938748	%	30/360	13,995.18	-	-	13,995.18	-	-		17,890,000.00
X-H	23,481,024.00	20,987,913.95	0.938748	%	30/360	16,418.64	-	-	16,418.64	-	-		20,987,913.95
Total	857,603,024.00	742,616,823.64				524,943.38	-	-	524,943.38	-	(597,702.77	)	742,019,120.87

Grand Total	1,799,184,102	1,563,159,796				2,851,376.55	-	629,160.81	3,480,537.36	-	(597,702.77	)	1,561,932,932

~~Commission~~Citigroup ~~File~~Commercial ~~Number~~Mortgage ofTrust ~~issuing~~2017-B1 ~~entity:~~Commercial ~~333~~Mortgage Pass-~~207132~~Through Certificates, Series 2017-13 B1 DISTRIBUTION SUMMARY - FACTORS

~~Central~~November ~~Index~~18, ~~Key Number of issuing entity: 0001713393~~ 2025

Citigroup Commercial Mortgage Trust 2017-B1


									Accretion
									&
									Non-Cash
					Other				Balance
			Record	Interest	(As Interest)	Principal	Total	Realized Loss	Increase/	Current
Class	CUSIP		Date	Distributed	Distributed	Distributed	Distributed	/(Recovery)	(Decrease)	Balance

A-1	17326	CAW4	10/31/2025	-	-	-	-	-	-	-
A-2	17326	CAX2	10/31/2025	-	-	-	-	-	-	-
A-3	17326	CAY0	10/31/2025	2.53520033	-	-	2.53520033	-	-	951.59223861
A-4	17326	CAZ7	10/31/2025	2.88166667	-	-	2.88166667	-	-	1,000.00000000
A-AB	17326	CBA1	10/31/2025	0.86222962	-	15.36906068	16.23129031	-	-	303.67982669
A-S	17326	CBB9	10/31/2025	3.09249994	-	-	3.09249994	-	-	1,000.00000000
X-A	17326	CBE3	10/31/2025	0.59595814	-	-	0.59595814	-	-	841.96389737
X-B	17326	CBF0	10/31/2025	0.22979035	-	-	0.22979035	-	-	1,000.00000000
X-D	17326CAJ3 U1740GAE4 17326CAK0		10/31/2025	1.03229031	-	-	1.03229031	-	-	1,000.00000000
X-E	17326CAL8 U1740GAF1 17326CAM6		10/31/2025	0.78229042	-	-	0.78229042	-	-	1,000.00000000
X-F	17326CAN4 U1740GAG9 17326CAP9		10/31/2025	0.78229067	-	-	0.78229067	-	-	1,000.00000000
X-H	17326CBK9 U1740GAM6 17326CBL7		10/31/2025	0.69923015	-	-	0.69923015	-	-	893.82447503
B	17326	CBC7	10/31/2025	3.30250000	-	-	3.30250000	-	-	1,000.00000000
C	17326	CBD5	10/31/2025	3.53229031	-	-	3.53229031	-	-	1,000.00000000
D	17326CAA2 U1740GAA2 17326CAB0		10/31/2025	2.50000000	-	-	2.50000000	-	-	1,000.00000000
E	17326CAC8 U1740GAB0 17326CAD6		10/31/2025	5.67990398	-	-	5.67990398	-	-	1,000.00000000
F	17326CAE4 U1740GAC8 17326CAF1		10/31/2025	-	-	-	-	-	-	1,000.00000000
G	17326CAG9 U1740GAD6 17326CAH7		10/31/2025	-	-	-	-	-	-	1,000.00000000
H	17326CBG8 U1740GAL8 17326CBH6		10/31/2025	-	-	-	-	-	-	893.82447503
R	17326	CAU8	10/31/2025	-	-	-	-	-	-	-
VRR	17326	CAT1	10/31/2025	3.02828579	-	0.66819609	3.69648188	-	-	870.78407799

~~Commission~~Citigroup ~~File~~Commercial ~~Number~~Mortgage ofTrust ~~depositor:~~2017-B1 ~~333~~Commercial Mortgage Pass-~~207132~~Through Certificates, Series 2017-B1 DISTRIBUTION INFORMATION - INTEREST DETAIL

~~Central~~November ~~Index~~18, ~~Key Number of depositor: 0001258361~~ 2025

Citigroup Commercial Mortgage Securities Inc.


			Rate					Interest			Shortfall			Paid
															Cap
							Accrual	Net	Accreted	Non	Carry	Cap Carryover			Carryover
Class	Uncapped Capped				Next		Dates	Accrued	/Deferred	Recovered	Forward	/Basis Risk	Accrued	Carry Forward	/Basis Risk	Total

A-1	2.00800	%	2.00800	%	2.00800	%	10/01-10/31	-	-	-	-	-	-	-	-	-
A-2	3.05300	%	3.05300	%	3.05300	%	10/01-10/31	-	-	-	-	-	-	-	-	-
A-3	3.19700	%	3.19700	%	3.19700	%	10/01-10/31	621,124.08	-	-	-	-	621,124.08	-	-	621,124.08
A-4	3.45800	%	3.45800	%	3.45800	%	10/01-10/31	772,603.65	-	-	-	-	772,603.65	-	-	772,603.65
A-AB	3.24300	%	3.24300	%	3.24300	%	10/01-10/31	33,532.11	-	-	-	-	33,532.11	-	-	33,532.11
A-S	3.71100	%	3.71100	%	3.71100	%	10/01-10/31	276,624.12	-	-	-	-	276,624.12	-	-	276,624.12
B	3.96300	%	3.96300	%	3.96300	%	10/01-10/31	125,547.84	-	-	-	-	125,547.84	-	-	125,547.84
C	4.31828	%	4.23875	%	4.23875	%	10/01-10/31	130,337.98	-	-	-	-	130,337.98	-	-	130,337.98
D	3.00000	%	3.00000	%	3.00000	%	10/01-10/31	103,425.00	-	-	-	-	103,425.00	-	-	103,425.00
E	3.30000	%	3.30000	%	3.30000	%	10/01-10/31	58,423.75	-	-	251.97	-	58,423.75	62,245.81	-	120,669.56
F	3.30000	%	3.30000	%	3.30000	%	10/01-10/31	24,598.75	-	-	24,870.45	-	-	-	-	-
G	3.30000	%	3.30000	%	3.30000	%	10/01-10/31	24,598.75	-	-	24,870.45	-	-	-	-	-
H	3.30000	%	3.30000	%	3.30000	%	10/01-10/31	57,716.76	-	-	63,553.65	-	-	-	-	-
R	0.00000	%	0.00000	%	0.00000	%	10/01-10/31	-	-	-	-	-	-	-	-	-
VRR	0.00000	%	0.00000	%	0.00000	%	10/01-10/31	142,568.83	-	-	-	-	142,568.83	-	-	142,568.83
Total								2,371,101.62	-	-	113,546.52	-	2,264,187.36	62,245.81	-	2,326,433.17
Notional
X-A	1.00278	%	0.84854	%	0.84854	%	10/01-10/31	426,468.24	-	-	-	-	426,468.24	-	-	426,468.24
X-B	0.35528	%	0.27575	%	0.27575	%	10/01-10/31	8,735.71	-	-	-	-	8,735.71	-	-	8,735.71
X-D	1.31828	%	1.23875	%	1.23875	%	10/01-10/31	42,705.85	-	-	-	-	42,705.85	-	-	42,705.85
X-E	1.01828	%	0.93875	%	0.93875	%	10/01-10/31	16,619.76	-	-	-	-	16,619.76	-	-	16,619.76
X-F	1.01828	%	0.93875	%	0.93875	%	10/01-10/31	13,995.18	-	-	-	-	13,995.18	-	-	13,995.18
X-H	1.01828	%	0.93875	%	0.93875	%	10/01-10/31	16,418.64	-	-	-	-	16,418.64	-	-	16,418.64
Total								524,943.38	-	-	-	-	524,943.38	-	-	524,943.38

Grand Total								2,896,045.00	-	-	113,546.52	-	2,789,130.74	62,245.81	-	2,851,376.55

~~Citi~~Citigroup ~~Real~~Commercial ~~Estate~~Mortgage ~~Funding~~Trust ~~Inc.~~2017-B1 Commercial Mortgage Pass-Through Certificates, Series 2017-B1 DISTRIBUTION INFORMATION - INTEREST SHORTFALL DETAIL

~~(Central~~November ~~Index~~18, ~~Key Number: 0001701238)~~ 2025

Morgan Stanley Mortgage Capital Holdings LLC


											Cap Carryover /
	Non-Recov Shortfall				Carry Forward Interest					Basis Risk Shortfall
			Other
Class	PPIS	SSRA	Shortfall	Prior	Int. on Prior	New	Paid	Outstanding	Prior	Int. on Prior	New	Paid	Outstanding

A-1	-	-	-	-	-	-	-	-	-	-	-	-	-
A-2	-	-	-	-	-	-	-	-	-	-	-	-	-
A-3	-	-	-	-	-	-	-	-	-	-	-	-	-
A-4	-	-	-	-	-	-	-	-	-	-	-	-	-
A-AB	-	-	-	-	-	-	-	-	-	-	-	-	-
A-S	-	-	-	-	-	-	-	-	-	-	-	-	-
B	-	-	-	-	-	-	-	-	-	-	-	-	-
C	-	-	-	-	-	-	-	-	-	-	-	-	-
D	-	-	-	-	-	-	-	-	-	-	-	-	-
E	-	-	-	91,625.79	251.97	-	62,245.81	29,631.95	-	-	-	-	-
F	-	-	-	98,801.63	271.70	24,598.75	-	123,672.08	-	-	-	-	-
G	-	-	-	98,801.63	271.70	24,598.75	-	123,672.08	-	-	-	-	-
H	-	-	-	2,122,505.32	5,836.89	57,716.76	-	2,186,058.97	-	-	-	-	-
R	-	-	-	-	-	-	-	-	-	-	-	-	-
VRR	-	-	-	-	-	-	-	-	-	-	-	-	-
Total	-	-	-	2,411,734.37	6,632.26	106,914.26	62,245.81	2,463,035.08	-	-	-	-	-
Notional
X-A	-	-	-	-	-	-	-	-	-	-	-	-	-
X-B	-	-	-	-	-	-	-	-	-	-	-	-	-
X-D	-	-	-	-	-	-	-	-	-	-	-	-	-
X-E	-	-	-	-	-	-	-	-	-	-	-	-	-
X-F	-	-	-	-	-	-	-	-	-	-	-	-	-
X-H	-	-	-	-	-	-	-	-	-	-	-	-	-
Total	-	-	-	-	-	-	-	-	-	-	-	-	-

Grand Total	-	-	-	2,411,734.37	6,632.26	106,914.26	62,245.81	2,463,035.08	-	-	-	-	-

~~Bank~~Citigroup ofCommercial ~~America~~Mortgage Trust 2017-B1 Commercial Mortgage Pass-Through Certificates, ~~National~~Series ~~Association~~2017-B1 DISTRIBUTION INFORMATION - PRINCIPAL DETAIL

~~(Central~~November ~~Index~~18, ~~Key Number: 0001102113)~~ 2025

Citigroup Global Markets Realty Corp.


					Accretion
					&
					Non-Cash
					Balance		Cumulative
	Prior	Principal	Accreted	Realized Loss	Increase/	Current	Realized	Class %		Class %		Sub %		Sub %
Class	Balance	Distributed	Principal	/(Recovery)	(Decrease)	Balance	Loss	Original		Current		Original		Current

A-1	-	-	-	-	-	-	-	2.26	%	0.00	%	30.00	%	34.13	%
A-2	-	-	-	-	-	-	-	5.61	%	0.00	%	30.00	%	34.13	%
A-3	233,140,098.46	-	-	-	-	233,140,098.46	-	26.02	%	28.43	%	30.00	%	34.13	%
A-4	268,110,000.00	-	-	-	-	268,110,000.00	-	28.47	%	32.70	%	30.00	%	34.13	%
A-AB	12,407,811.23	597,702.77	-	-	-	11,810,108.46	-	4.13	%	1.44	%	30.00	%	34.13	%
A-S	89,450,000.00	-	-	-	-	89,450,000.00	-	9.50	%	10.91	%	20.00	%	22.65	%
B	38,016,000.00	-	-	-	-	38,016,000.00	-	4.04	%	4.64	%	15.75	%	17.77	%
C	36,899,000.00	-	-	-	-	36,899,000.00	-	3.92	%	4.50	%	11.63	%	13.03	%
D	41,370,000.00	-	-	-	-	41,370,000.00	-	4.39	%	5.05	%	7.00	%	7.72	%
E	21,245,000.00	-	-	-	-	21,245,000.00	-	2.26	%	2.59	%	4.63	%	4.99	%
F	8,945,000.00	-	-	-	-	8,945,000.00	-	0.95	%	1.09	%	3.63	%	3.84	%
G	8,945,000.00	-	-	-	-	8,945,000.00	-	0.95	%	1.09	%	2.62	%	2.69	%
H	20,987,913.95	-	-	-	-	20,987,913.95	2,493,110.05	2.49	%	2.56	%	0.00	%	0.00	%
R	-	-	-	-	-	-	-	0.00	%	0.00	%	0.00	%	0.00	%
VRR	41,027,148.67	31,458.04	-	-	-	40,995,690.63	131,216.31	5.00	%	5.00	%	0.00	%	0.00	%

Total	820,542,972.31	629,160.81	-	-	-	819,913,811.50	2,624,326.36	99.99	%	100.00	%

~~(Exact~~Citigroup ~~names~~Commercial ofMortgage ~~sponsors~~Trust as2017-B1 ~~specified~~Commercial inMortgage ~~their~~Pass-Through ~~respective~~Certificates, ~~charters)~~Series 2017-B1 RECONCILIATION DETAIL

~~Richard~~November ~~Simpson~~18, ~~(212) 816-5343~~ 2025

(Name and telephone number, including area code, of the person to contact in connection with this filing)


SOURCE OF FUNDS			ALLOCATION OF FUNDS

Interest Funds Available			Scheduled Fees
Scheduled Interest	2,871,653.40		Servicing Fee	4,355.77
Prepayment Interest Shortfall	-		Trustee/Certificate Administrator Fee	4,663.42
Interest Adjustments	-		Operating Advisor Fee	763.15
ASER Amount	-		Asset Representations Reviewer Ongoing Fee	164.28
Realized Loss in Excess of Principal Balance	-		CREFC Intellectual Property Royalty License Fee	353.29
Total Interest Funds Available		2,871,653.40	Total Scheduled Fees		10,299.91
Principal Funds Available			Additional Fees, Expenses, etc.
Scheduled Principal	629,160.81		Additional Servicing Fee	-
Curtailments	-		Special Servicing Fee	7,000.00
Unscheduled Principal Collections	-		Work-out Fee	2,976.94
Net Liquidation Proceeds	-		Liquidation Fee	-
Repurchased Principal	-		Trust Fund Expenses	-
Substitution Principal	-		Trust Advisor Expenses	-
Other Principal	-		Reimbursement of Nonrecoverable Advances To the Servicer	-
			Reimbursement of Interest on Advances to the Servicer	-
Total Principal Funds Available		629,160.81
			Borrower Reimbursable Trust Fund Expenses	-
Other Funds Available
			Other Expenses	-
Yield Maintenance Charges	-
Withdrawal of Withheld Amounts from the Interest Reserve			Total Additional Fees, Expenses, etc.		9,976.94
Account	-
			Distributions
Deposit of Withheld Amounts to the Interest Reserve Account	-
			Interest Distribution	2,851,376.55
Total Other Funds Available		-	Principal Distribution	629,160.81
			Yield Maintenance Charge Distribution	-
			Total Distributions		3,480,537.36




Total Funds Available		3,500,814.21
			Total Funds Allocated		3,500,814.21

~~(State~~Citigroup orCommercial ~~other jurisdiction~~Mortgage ofTrust ~~incorporation~~2017-B1 orCommercial ~~organization~~Mortgage ofPass-Through ~~the~~Certificates, ~~issuing~~Series ~~entity)~~2017-B1 OTHER INFORMATION Interest Reserve Account Information

~~82-2624993~~November 18, 2025

82-2680021


Beginning Interest Reserve Account Balance	0.00
Deposit of Withheld Amounts to the Interest Reserve Account	0.00
Withdrawal of Withheld Amounts from the Interest Reserve Account	0.00
Ending Interest Reserve Account Balance	0.00
Excess Liquidation Proceeds Reserve Account Information
Beginning Excess Liquidation Proceeds Reserve Account Balance	0.00
Deposit to the Excess Liquidation Proceeds Reserve Account	0.00
Withdrawal from the Excess Liquidation Proceeds Reserve Account	0.00
Ending Excess Liquidation Proceeds Reserve Account Balance	0.00
ARD Mortgage Loan Information
Excess Interest	0.00
Collateral Information
% of Cut-Off Principal Balance Outstanding	87.078408	%
Controlling Class Information
The Controlling Class is Class H.
The Controlling Class Representative is Investin Pro RED Holdings, LLC
There Are No Disclosable Special Servicer Fees.

~~(I.R.S.~~Citigroup ~~Employer~~Commercial ~~Identification~~Mortgage ~~No.)~~Trust 2017-B1 Commercial Mortgage Pass-Through Certificates, Series 2017-B1 STRATIFICATION DETAIL

c/o Citibank, N.A. 388 Greenwich Street, 14th Floor New York, New York		10013
(Address of principal executive offices of the issuing entity)		(Zip Code)

November 18, 2025

(212) 816-5693


Anticipated Remaining Term

Anticipated Remaining	Asset	Ending Scheduled	% of			Wtd Avg
Term Range	Count	Balance	Agg.Bal. WAC		WAM	DSCR

60 Months or Less	47	819,913,811.53	100.00	4.1163	20	2.020776
61 to 90 Months	0	0.00	0.00	0.0000	0	0.000000
91 Months or Greater	0	0.00	0.00	0.0000	0	0.000000
Total	47	819,913,811.53	100.00	4.1163	20	2.020776

Debt Service Coverage Ratio

Debt Service Coverage	Asset	Ending Scheduled	% of			Wtd Avg
Ratio Range	Count	Balance	Agg.Bal. WAC		WAM	DSCR

1.250 or Less	7	151,966,235.20	18.53	3.7922	20	0.354493
1.251 to 1.500	6	91,206,091.52	11.12	4.6869	20	1.450004
1.501 to 1.750	7	132,579,986.76	16.17	4.0662	19	1.699822
1.751 to 2.000	5	92,782,157.70	11.32	4.3983	20	1.864866
2.001 to 2.250	5	54,781,653.58	6.68	4.4032	20	2.184360
2.251 to 2.500	6	99,803,879.22	12.17	4.1935	20	2.399134
2.501 to 2.750	3	33,097,980.46	4.04	4.3700	20	2.652350
2.751 to 3.000	0	0.00	0.00	0.0000	0	0.000000
3.001 to 3.250	2	14,658,827.09	1.79	4.2247	21	3.084070
3.251 to 3.500	2	28,350,000.00	3.46	3.9462	20	3.425465
3.501 to 3.750	2	47,730,000.00	5.82	4.0153	20	3.704369
3.751 to 4.000	0	0.00	0.00	0.0000	0	0.000000
4.001 or Greater	2	72,957,000.00	8.90	3.4852	20	4.198775
Total	47	819,913,811.53	100.00	4.1163	20	2.020776

Title of class	Registered/reporting pursuant to (check one)			Name of exchange (If Section 12(b))
	Section 12(b)	Section 12(g)	Section 15(d)
A-1	☐	☐	☒	Not Applicable
A-2	☐	☐	☒	Not Applicable
A-3	☐	☐	☒	Not Applicable
A-4	☐	☐	☒	Not Applicable
A-AB	☐	☐	☒	Not Applicable
X-A	☐	☐	☒	Not Applicable
X-B	☐	☐	☒	Not Applicable
A-S	☐	☐	☒	Not Applicable
B	☐	☐	☒	Not Applicable
C	☐	☐	☒	Not Applicable

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

STRATIFICATION DETAIL

~~Indicate~~November by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports)18, ~~and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐~~ 2025

PART I – DISTRIBUTION INFORMATION


Ending Schedule Balance

Ending Schedule Balance	Asset	Ending Scheduled	% of			Wtd Avg
Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

1 to 5,000,000	6	22,072,265.68	2.69	4.6740	20	1.755651
10,000,001 to 15,000,000	4	52,380,970.71	6.39	4.1671	19	1.407759
15,000,001 to 20,000,000	2	30,700,000.00	3.74	3.3795	20	-0.660290
20,000,001 to 25,000,000	9	200,883,954.66	24.50	4.0648	19	2.432553
25,000,001 to 30,000,000	2	59,636,687.29	7.27	4.5439	21	2.184848
30,000,001 to 35,000,000	0	0.00	0.00	0.0000	0	0.000000
35,000,001 to 40,000,000	2	77,500,000.00	9.45	3.6932	20	1.925265
40,000,001 to 45,000,000	1	41,700,000.00	5.09	4.3200	21	1.817700
45,000,001 to 50,000,000	1	46,536,960.16	5.68	4.6300	21	1.497800
5,000,001 to 10,000,000	17	126,202,856.69	15.39	4.5030	20	2.158892
50,000,001 to 55,000,000	2	103,300,116.34	12.60	3.7731	20	2.685861
55,000,001 to 60,000,000	1	59,000,000.00	7.20	3.7700	21	1.713000
60,000,001 to 65,000,000	0	0.00	0.00	0.0000	0	0.000000
65,000,001 to 70,000,000	0	0.00	0.00	0.0000	0	0.000000
70,000,001 to 75,000,000	0	0.00	0.00	0.0000	0	0.000000
75,000,001 to 80,000,000	0	0.00	0.00	0.0000	0	0.000000
80,000,001 to 85,000,000	0	0.00	0.00	0.0000	0	0.000000
85,000,000+	0	0.00	0.00	0.0000	0	0.000000
Total	47	819,913,811.53	100.00	4.1163	20	2.020776

OnCitigroup ~~October 20,~~Commercial ~~2025,~~Mortgage aTrust ~~distribution~~2017-B1 ~~was made to holders of the certificates issued by Citigroup~~ Commercial Mortgage ~~Trust~~Pass-Through Certificates, Series 2017-B1. STRATIFICATION DETAIL

~~The~~November ~~distribution~~18, ~~report is attached as Exhibit 99.1 to this Form 10-D.~~ 2025

No assets securitized by Citigroup Commercial Mortgage Securities Inc. (the “Depositor”) and held by Citigroup Commercial Mortgage Trust 2017-B1 were the subject of a demand to repurchase or replace for breach of the representations and warranties contained in the underlying transaction documents during the monthly distribution period covered by this distribution report on Form 10-D.


Loan Rate

	Asset	Ending Scheduled	% of			Wtd Avg
Loan Rate Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

4.00 or Less	11	312,157,000.00	38.07	3.6095	20	2.218345
4.01 to 4.25	7	143,096,252.06	17.45	4.1443	18	1.647536
4.26 to 4.50	13	175,070,172.39	21.35	4.3666	20	2.291731
4.51 to 4.75	9	147,984,996.89	18.05	4.6455	20	1.828744
4.76 to 5.00	6	37,622,875.81	4.59	4.8641	19	1.359034
5.01 to 5.25	1	3,982,514.38	0.49	5.1100	20	1.422000
5.26 to 5.50	0	0.00	0.00	0.0000	0	0.000000
5.51 to 5.75	0	0.00	0.00	0.0000	0	0.000000
5.76 to 6.00	0	0.00	0.00	0.0000	0	0.000000
6.01 to 6.25	0	0.00	0.00	0.0000	0	0.000000
6.26 to 6.50	0	0.00	0.00	0.0000	0	0.000000
6.51 to 6.75	0	0.00	0.00	0.0000	0	0.000000
6.76 to 7.00	0	0.00	0.00	0.0000	0	0.000000
7.01 or Greater	0	0.00	0.00	0.0000	0	0.000000
Total	47	819,913,811.53	100.00	4.1163	20	2.020776

Property Type

	Asset	Ending Scheduled	% of			Wtd Avg
Property Type Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

Industrial	0	0.00	0.00	0.0000	0	0.000000
Lodging	4	106,056,470.43	12.94	4.6232	21	2.034824
Mixed Use	7	161,733,446.51	19.73	3.7882	20	2.963822
Multifamily	3	71,310,283.70	8.70	4.2863	20	2.017337
Office	8	122,646,838.70	14.96	4.2438	20	1.015291
Other	4	78,200,000.00	9.54	3.4958	20	0.311294
Retail	11	183,462,378.81	22.38	4.1384	19	2.049605
Self Storage	9	90,702,448.24	11.06	4.2417	20	3.088137
Total	47	819,913,811.53	100.00	4.1163	20	2.020776

~~The~~Reports ~~Depositor~~Available ~~most~~at ~~recently~~sf.citidirect.com ~~filed~~v. a21.09.28 ~~Form~~Page ~~ABS-15G~~11 ~~under Rule 15Ga-1 under the Securities Exchange Act~~ of ~~1934~~42 ~~(“Rule~~© ~~15Ga-1”)~~Copyright ~~on February 13,~~ 2025. ~~The CIK number of the Depositor is 0001258361.~~ Citigroup

~~Citi~~Citigroup ~~Real~~Commercial ~~Estate~~Mortgage ~~Funding~~Trust ~~Inc. (“CREFI”), one of the sponsors, most recently filed a Form ABS~~2017-~~15G~~B1 ~~under~~Commercial ~~Rule~~Mortgage ~~15Ga~~Pass-1Through ~~on February 13~~Certificates, ~~2025.~~Series ~~The~~2017-B1 ~~CIK~~STRATIFICATION ~~number of CREFI is 0001701238.~~ DETAIL

~~Morgan~~November ~~Stanley Mortgage Capital Holdings LLC (“MSMCH”)~~18, ~~one of the sponsors, most recently filed a Form ABS-15G under Rule 15Ga-1 on August 12,~~ 2025~~. The CIK number of MSMCH is 0001541557.~~

Bank of America, National Association (“BANA”), one of the sponsors, most recently filed a Form ABS-15G under Rule 15Ga-1 on August 8, 2025. The CIK number of BANA is 0001102113.


Remaining Amortization Term

Remaining Amortization	Asset	Ending Scheduled	% of			Wtd Avg
Term Range	Count	Balance	Agg.Bal.	WAC	WAM	DSCR

240 Months or Less	24	563,637,118.39	68.74	3.9385	20	2.109739
241 to 270 Months	23	256,276,693.14	31.26	4.5075	20	1.825118
271 to 300 Months	0	0.00	0.00	0.0000	0	0.000000
301 Months or Greater	0	0.00	0.00	0.0000	0	0.000000
Total	47	819,913,811.53	100.00	4.1163	20	2.020776

Seasoning

	Asset	Ending Scheduled	% of			Wtd Avg
Seasoning Range	Count	Balance	Agg.Bal.	WAC	WAM	DSCR

12 Months or Less	0	0.00	0.00	0.0000	0	0.000000
13 to 24 Months	0	0.00	0.00	0.0000	0	0.000000
25 to 36 Months	0	0.00	0.00	0.0000	0	0.000000
37 to 48 Months	0	0.00	0.00	0.0000	0	0.000000
49 Months or Greater	47	819,913,811.53	100.00	4.1163	20	2.020776
Total	47	819,913,811.53	100.00	4.1163	20	2.020776

~~Citigroup~~Reports ~~Global~~Available ~~Markets~~at ~~Realty~~sf.citidirect.com ~~Corp~~v. ~~(“CGMRC”), one of the sponsors, most recently filed a Form ABS-15G under Rule 15Ga-1 on February 13, 2025~~21.09.28 ~~The~~Page ~~CIK~~12 ~~number~~ of ~~CGMRC~~42 is© ~~0001541001.~~Copyright 2025 Citigroup

~~Item~~Citigroup ~~1A.~~Commercial ~~Asset~~Mortgage Trust 2017-~~Level~~B1 ~~Information.~~Commercial Mortgage Pass-Through Certificates, Series 2017-B1 STRATIFICATION DETAIL

~~See~~November ~~the Asset Data File and the asset related document filed as Exhibit 102 and Exhibit 103~~18, ~~respectively, to the registrant’s Form ABS-EE filed on October 30,~~ 2025 ~~under Commission File No. 333-207132-13 and incorporated by reference herein.~~

Item 1B. Asset Representations Reviewer and Investor Communication.


State

	Asset	Ending Scheduled	% of			Wtd Avg
State Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

Alabama	0	0.00	0.00	0.0000	0	0.000000
Arizona	0	0.00	0.00	0.0000	0	0.000000
California	3	75,064,355.55	9.16	4.3768	20	2.275000
Florida	4	31,605,000.00	3.85	4.2439	20	3.016623
Georgia	0	0.00	0.00	0.0000	0	0.000000
Illinois	3	15,925,239.54	1.94	4.8538	20	1.165793
Indiana	1	4,651,686.15	0.57	4.7900	20	1.446600
Kansas	1	13,040,898.19	1.59	4.8500	17	1.408000
Kentucky	0	0.00	0.00	0.0000	0	0.000000
Maryland	0	0.00	0.00	0.0000	0	0.000000
Michigan	1	21,375,949.76	2.61	4.5900	21	1.390000
N/A	3	67,700,000.00	8.26	3.4300	20	0.000000
Nevada	1	9,433,446.51	1.15	4.2591	20	2.551500
New Jersey	0	0.00	0.00	0.0000	0	0.000000
New York	11	234,212,932.26	28.57	3.9349	20	2.412851
North Carolina	0	0.00	0.00	0.0000	0	0.000000
Ohio	1	7,087,783.70	0.86	4.4890	20	2.485600
Pennsylvania	1	23,000,000.00	2.81	4.0510	20	1.662800
Texas	5	54,309,580.49	6.62	4.3808	20	1.931174
Various	0	0.00	0.00	0.0000	0	0.000000
Total	47	819,913,811.53	100.00	4.1163	20	2.020776

~~PART~~Citigroup IICommercial –Mortgage ~~OTHER~~Trust ~~INFORMATION~~2017-B1 Commercial Mortgage Pass-Through Certificates, Series 2017-B1 MORTGAGE LOAN DETAIL

NoNovember ~~information~~18, ~~to report for the monthly distribution period covered by this distribution report on Form 10-D.~~ 2025

Item 3. Sales of Securities and Use of Proceeds.


			Prop			Paid					Beginning	Ending		Payment Workout Mod
			Type			Through	Gross		Interest	Principal	Scheduled	Scheduled	Maturity	Status		Strategy Code
Loan ID	OMCR		(1)	City	State	Date	Coupon		Payment	Payment	Balance	Balance	Date	(2	)	(3	)	(4	)

304101882	1		MU	New York	NY	11/09/2025	3.43000	%	73,840.28	-	25,000,000.00	25,000,000.00	06/09/2027	0		0		0
304101843	10		RT	New York	NY	11/06/2025	4.36600	%	112,788.33	-	30,000,000.00	30,000,000.00	08/06/2027	0		0		0
1749262	11		OF	Troy	MI	11/01/2025	4.59000	%	84,662.31	43,989.48	21,419,939.24	21,375,949.76	08/01/2027	0		0		0
1647690	12		RT	Various	XX	11/01/2025	4.19000	%	88,528.15	-	24,536,250.00	24,536,250.00	11/01/2026	0		0		0
1749833	13		LO	Lafayette	LA	11/01/2025	4.42000	%	78,160.64	43,309.57	20,535,564.47	20,492,254.90	08/01/2027	0		0		8
300801642	14		MU	Lahaska	PA	11/01/2025	4.05100	%	80,232.31	-	23,000,000.00	23,000,000.00	07/01/2027	0		0		0
1749778	15		MF	Dallas	TX	11/01/2025	4.16000	%	80,680.60	-	22,522,500.00	22,522,500.00	07/01/2027	0		0		0
304101831	16		MU	Corona	NY	11/06/2025	4.36000	%	82,597.78	-	22,000,000.00	22,000,000.00	07/06/2027	0		0		0
300801633	17		MU	New Rochelle	NY	11/01/2025	3.80000	%	70,352.78	-	21,500,000.00	21,500,000.00	07/01/2027	0		0		0
308511018	18		RT	Torrance	CA	11/01/2025	3.65750	%	64,429.61	-	20,457,000.00	20,457,000.00	06/01/2027	0		0		0
304101851	19		OF	New York	NY	11/06/2025	3.33000	%	44,446.25	-	15,500,000.00	15,500,000.00	08/06/2027	0		0		0
304101891	1	A	N/A			11/09/2025	3.43000	%	44,304.17	-	15,000,000.00	15,000,000.00	06/09/2027	0		0		0
453011619	1	B	N/A			11/09/2025	3.43000	%	44,894.89	-	15,200,000.00	15,200,000.00	06/09/2027	0		0		0
453011576	1	C	N/A			11/09/2025	3.43000	%	110,760.42	-	37,500,000.00	37,500,000.00	06/09/2027	0		0		0
1749343	2		RT	Metairie	LA	11/01/2025	3.77000	%	191,536.94	-	59,000,000.00	59,000,000.00	08/01/2027	0		0		0
300801632	20		OF	Wichita	KS	11/01/2025	4.85000	%	54,572.03	25,900.97	13,066,799.16	13,040,898.19	04/01/2027	0		0		0
304101858	21		SS	Various	XX	11/06/2025	4.51000	%	53,839.82	23,266.69	13,863,339.21	13,840,072.52	08/06/2027	0		0		0
1749084	22		RT	Plano	TX	11/01/2025	4.64000	%	30,967.11	41,138.16	7,750,388.20	7,709,250.04	08/01/2027	0		0		0
1648607	24		LO	El Paso	TX	11/01/2025	4.71500	%	38,203.93	18,945.45	9,409,513.53	9,390,568.08	08/01/2027	0		8		8
1749362	25		OF	Houston	TX	11/01/2025	4.25000	%	33,727.05	20,066.58	9,215,739.33	9,195,672.75	07/01/2027	0		0		0
304101839	26		N/A	Maitland	FL	11/06/2025	3.92000	%	35,443.33	-	10,500,000.00	10,500,000.00	07/06/2027	0		0		0
1647637	27		OF	Rochester	NY	10/01/2025	4.28000	%	20,695.24	35,820.37	5,615,228.60	5,579,408.23	08/01/2027	B		11		0
203041833	29		MU	Reno	NV	11/06/2025	4.25906	%	34,650.92	14,596.12	9,448,042.63	9,433,446.51	07/06/2027	0		0		0
1749761	3		OF	Milwaukee	WI	11/01/2025	4.14000	%	181,429.24	91,676.67	50,891,793.01	50,800,116.34	07/01/2027	0		0		0
304101859	30		RT	Chicago	IL	01/06/2020	4.91000	%	-	-	8,770,446.11	8,770,446.11	08/06/2027	3		2		0
304101862	31		RT	Ka'anapali	HI	11/06/2025	4.08000	%	28,628.68	14,754.82	8,148,581.91	8,133,827.09	08/06/2027	0		0		0
308511032	32		RT	Hercules	CA	11/06/2025	4.74000	%	32,986.79	11,302.01	8,081,697.40	8,070,395.39	08/06/2027	0		0		0
1749956	33		MU	Brooklyn	NY	11/01/2025	4.40000	%	31,447.78	-	8,300,000.00	8,300,000.00	08/01/2027	0		0		0
300801641	34		MF	Marysville	OH	11/01/2025	4.48900	%	27,444.51	12,025.98	7,099,809.68	7,087,783.70	07/01/2027	0		0		0
300801651	35		SS	Miami Gardens	FL	11/01/2025	4.40500	%	29,321.39	-	7,730,000.00	7,730,000.00	08/01/2027	0		0		0
300801648	36		SS	Hialeah	FL	11/01/2025	4.40500	%	25,983.38	-	6,850,000.00	6,850,000.00	08/01/2027	0		0		0
300801649	37		SS	Hialeah	FL	11/01/2025	4.40500	%	24,750.59	-	6,525,000.00	6,525,000.00	08/01/2027	0		0		0

~~Item~~Citigroup 4.Commercial ~~Defaults~~Mortgage ~~Upon~~Trust ~~Senior~~2017-B1 ~~Securities.~~Commercial Mortgage Pass-Through Certificates, Series 2017-B1 MORTGAGE LOAN DETAIL

~~None~~November 18, 2025

Item 5. Submission of Matters to a Vote of Security Holders.


		Prop			Paid					Beginning	Ending		Payment Workout Mod
		Type			Through	Gross		Interest	Principal	Scheduled	Scheduled	Maturity	Status Strategy Code
Loan ID	OMCR	(1)	City	State	Date	Coupon		Payment	Payment	Balance	Balance	Date	(2	)	(3	)	(4	)

1749521	38	RT	Saugerties	NY	11/01/2025	4.73000	%	24,201.49	8,326.17	5,941,850.20	5,933,524.03	08/01/2027	0		0		0
304101856	39	RT	Brooklyn	NY	11/06/2025	4.45000	%	23,758.06	-	6,200,000.00	6,200,000.00	08/06/2027	0		0		0
304101861	4	LO	San Diego	CA	11/06/2025	4.63000	%	185,985.65	111,707.96	46,648,668.12	46,536,960.16	08/06/2027	0		8		8
300801659	40	MH	Brookings	OR	11/01/2025	4.92000	%	24,614.10	7,834.42	5,809,779.56	5,801,945.14	08/01/2027	0		0		0
304101838	41	SS	Balch Springs	TX	11/06/2025	4.57000	%	21,647.07	9,182.91	5,500,772.53	5,491,589.62	07/06/2027	0		0		0
300801640	42	SS	Castle Rock	CO	11/01/2025	4.23500	%	17,932.10	9,321.85	4,917,207.73	4,907,885.88	07/01/2027	0		0		0
1749567	43	RT	Goshen	IN	11/01/2025	4.79000	%	19,220.04	8,031.14	4,659,717.29	4,651,686.15	07/01/2027	0		0		0
1749823	45	OF	Barrington	IL	11/01/2025	5.11000	%	17,557.53	7,582.32	3,990,096.70	3,982,514.38	07/01/2027	0		0		0
300801653	46	SS	Shreveport	LA	11/01/2025	4.77300	%	15,397.43	6,439.26	3,746,256.60	3,739,817.34	08/01/2027	0		0		0
300801652	47	OF	Skokie	IL	11/01/2025	4.37700	%	11,978.63	5,850.07	3,178,129.12	3,172,279.05	08/01/2027	0		0		0
300801650	48	SS	Baton Rouge	LA	11/01/2025	4.95300	%	6,912.77	2,698.38	1,620,781.26	1,618,082.88	08/01/2027	0		0		0
300801657	5	MU	Bronx	NY	11/01/2025	3.41800	%	154,522.08	-	52,500,000.00	52,500,000.00	08/01/2027	0		0		0
304101849	7	MF	New York	NY	11/06/2025	4.32000	%	155,124.00	-	41,700,000.00	41,700,000.00	08/06/2027	0		0		0
308511008	8	SS	Various	XX	11/06/2025	3.94000	%	135,711.11	-	40,000,000.00	40,000,000.00	07/06/2027	0		0		0
300801656	9	LO	Various	XX	11/01/2025	4.72400	%	120,784.09	55,393.46	29,692,080.75	29,636,687.29	08/01/2027	0		0		0
Total	Count = 47							2,871,653.40	629,160.81	820,542,972.34	819,913,811.53

~~Item~~Citigroup 6.Commercial ~~Significant~~Mortgage ~~Obligors~~Trust of2017-B1 ~~Pool~~Commercial ~~Assets.~~Mortgage Pass-Through Certificates, Series 2017-B1 NOI DETAIL

~~With~~November ~~respect to the pool assets for Citigroup Commercial Mortgage Trust 2017-B1~~18, ~~there are no significant obligors within the meaning of Item 1101(k) of Regulation AB.~~ 2025

Item 7. Change in Sponsor Interest in Securities.


			Property			Ending	Preceding	Most		Most Recent	Most Recent
			Type			Scheduled	Fiscal	Recent		Financial As of	Financial Asof
Loan ID	OMCR		(1)	City	State	Balance	Year NOI	NOI		Start Date	End Date

304101882	1		MU	New York	NY	25,000,000.00	191,484,942.44	143,816,580.71		01/01/2025	09/30/2025
304101843	10		RT	New York	NY	30,000,000.00	2,630,482.76	1,945,363.71		01/01/2025	09/30/2025
1749262	11		OF	Troy	MI	21,375,949.76	2,580,665.74	1,346,927.45		01/01/2025	06/30/2025
1647690	12		RT	Various	XX	24,536,250.00	1,850,786.91	1,666,354.93		01/01/2025	09/30/2025
1749833	13		LO	Lafayette	LA	20,492,254.90	5,070,580.52	4,535,756.92		07/01/2024	06/30/2025
300801642	14		MU	Lahaska	PA	23,000,000.00	2,737,569.02	431,260.35		01/01/2025	03/31/2025
1749778	15		MF	Dallas	TX	22,522,500.00	2,288,834.10	1,663,116.22		01/01/2025	09/30/2025
304101831	16		MU	Corona	NY	22,000,000.00	2,194,721.64	1,808,227.29		01/01/2025	09/30/2025
300801633	17		MU	New Rochelle	NY	21,500,000.00	4,278,138.28	1,580,247.83		01/01/2025	06/30/2025
308511018	18		RT	Torrance	CA	20,457,000.00	59,746,222.00	29,982,273.00		01/01/2025	06/30/2025
304101851	19		OF	New York	NY	15,500,000.00	646,698.51	(119,489.48	)	Not Available	Not Available
304101891	1	A	N/A			15,000,000.00	-	-		Not Available	Not Available
453011619	1	B	N/A			15,200,000.00	-	-		Not Available	Not Available
453011576	1	C	N/A			37,500,000.00	-	-		Not Available	Not Available
1749343	2		RT	Metairie	LA	59,000,000.00	17,197,853.81	6,450,326.88		01/01/2025	06/30/2025
300801632	20		OF	Wichita	KS	13,040,898.19	1,230,397.39	1,088,531.98		Not Available	Not Available
304101858	21		SS	Various	XX	13,840,072.52	2,060,726.75	1,571,271.71		01/01/2025	09/30/2025
1749084	22		RT	Plano	TX	7,709,250.04	1,272,584.00	966,211.00		Not Available	Not Available
1648607	24		LO	El Paso	TX	9,390,568.08	1,542,528.17	1,586,248.34		10/01/2024	09/30/2025
1749362	25		OF	Houston	TX	9,195,672.75	1,119,548.00	773,888.91		01/01/2025	09/30/2025
304101839	26		N/A	Maitland	FL	10,500,000.00	955,436.00	482,448.00		01/01/2025	06/30/2025
1647637	27		OF	Rochester	NY	5,579,408.23	1,635,663.00	1,648,148.00		01/01/2025	06/30/2025
203041833	29		MU	Reno	NV	9,433,446.51	12,679,152.27	6,497,910.69		01/01/2025	06/30/2025
1749761	3		OF	Milwaukee	WI	50,800,116.34	8,154,416.17	4,191,024.99		01/01/2025	06/30/2025
304101859	30		RT	Chicago	IL	8,770,446.11	134,272.00	84,600.00		Not Available	Not Available
304101862	31		RT	Ka'anapali	HI	8,133,827.09	1,079,315.57	866,006.35		01/01/2025	06/30/2025
308511032	32		RT	Hercules	CA	8,070,395.39	904,708.00	691,702.33		01/01/2025	09/30/2025
1749956	33		MU	Brooklyn	NY	8,300,000.00	571,362.05	313,719.53		01/01/2025	06/30/2025
300801641	34		MF	Marysville	OH	7,087,783.70	1,150,008.63	605,244.04		01/01/2025	06/30/2025
300801651	35		SS	Miami Gardens	FL	7,730,000.00	1,260,155.50	936,071.93		01/01/2025	09/30/2025
300801648	36		SS	Hialeah	FL	6,850,000.00	1,036,491.34	799,275.55		01/01/2025	09/30/2025
300801649	37		SS	Hialeah	FL	6,525,000.00	933,953.42	669,350.19		01/01/2025	09/30/2025
Reports Available at sf.citidirect.com			v. 21.09.28			Page 16 of 42				© Copyright 2025 Citigroup

~~None~~Citigroup Commercial Mortgage Trust 2017-B1 Commercial Mortgage Pass-Through Certificates, Series 2017-B1 NOI DETAIL

~~Item~~November 8.18, ~~Significant Enhancement Provider Information.~~2025

None


		Property			Ending	Preceding	Most	Most Recent	Most Recent
		Type			Scheduled	Fiscal	Recent	Financial As of	Financial Asof
Loan ID	OMCR	(1)	City	State	Balance	Year NOI	NOI	Start Date	End Date

1749521	38	RT	Saugerties	NY	5,933,524.03	712,467.00	531,853.00	Not Available	Not Available
304101856	39	RT	Brooklyn	NY	6,200,000.00	513,664.01	258,119.49	01/01/2025	06/30/2025
304101861	4	LO	San Diego	CA	46,536,960.16	6,907,263.48	6,106,322.99	07/01/2024	06/30/2025
300801659	40	MH	Brookings	OR	5,801,945.14	792,245.45	654,255.59	Not Available	Not Available
304101838	41	SS	Balch Springs	TX	5,491,589.62	688,898.78	542,533.41	Not Available	Not Available
300801640	42	SS	Castle Rock	CO	4,907,885.88	697,896.91	332,335.03	01/01/2024	06/30/2024
1749567	43	RT	Goshen	IN	4,651,686.15	510,271.03	379,959.77	01/01/2025	09/30/2025
1749823	45	OF	Barrington	IL	3,982,514.38	447,957.17	359,807.22	01/01/2025	09/30/2025
300801653	46	SS	Shreveport	LA	3,739,817.34	466,900.54	226,954.97	Not Available	Not Available
300801652	47	OF	Skokie	IL	3,172,279.05	637,004.41	305,385.50	01/01/2025	06/30/2025
300801650	48	SS	Baton Rouge	LA	1,618,082.88	151,113.47	78,499.57	Not Available	Not Available
300801657	5	MU	Bronx	NY	52,500,000.00	7,293,705.89	3,993,739.44	01/01/2025	06/30/2025
304101849	7	MF	New York	NY	41,700,000.00	3,266,504.36	1,665,207.18	01/01/2025	06/30/2025
308511008	8	SS	Various	XX	40,000,000.00	12,038,684.58	9,049,149.92	01/01/2025	09/30/2025
300801656	9	LO	Various	XX	29,636,687.29	5,670,092.00	5,800,183.79	10/01/2024	09/30/2025
Total	Count = 47				819,913,811.53	371,222,883.07	249,162,906.22

~~Wells Fargo Bank, National Association, in its capacity as Master Servicer for~~ Citigroup Commercial Mortgage Trust 2017-B1, ~~affirms~~Commercial ~~the~~Mortgage ~~following~~Pass-Through ~~amounts~~Certificates, inSeries ~~the~~2017-B1 ~~respective~~DELINQUENCY ~~accounts:~~LOAN DETAIL

Collection Account Balance
Prior Distribution Date:	09/17/2025	$0.00
Current Distribution Date:	10/20/2025	$0.00
Loan Combination Custodial Account Balance
Prior Distribution Date:	09/17/2025	$0.00
Current Distribution Date:	10/20/2025	$0.00
*REO Account Balance
Prior Distribution Date:	09/17/2025	$0.00
Current Distribution Date:	10/20/2025	$0.00
*As provided by the Special Servicer

November 18, 2025

Citibank, N.A., in its capacity as Certificate Administrator for Citigroup Commercial Mortgage Trust 2017-B1, affirms the following amounts in the respective accounts:

Actual

Paid

Current P&I

Total P&I

Cumulative

Other Expense

Payment Workout

Most Recent

Principal

Through

Advances

Accrued Unpaid

Advances

Status

Strategy

Special Serv

Foreclosure

Bankruptcy

REO

Loan ID

OMCR

Balance

Date

(Net of ASER)

Outstanding

Interest Advances

Outstanding

)

Transfer Date

Date

1647637

5,615,228.60

10/01/2025

56,515.61

56,491.43

669.83

109,015.58

09/20/2021

304101859

9,401,987.23

01/06/2020

181,910.57

75,523.27

01/21/2020

Total

Count = 2

15,017,215.83

56,515.61

56,491.43

182,580.40

184,538.85

Distribution Account Balance
Prior Distribution Date:	09/17/2025	$3.50
Current Distribution Date:	10/20/2025	$3.54
Interest Reserve Account Balance
Prior Distribution Date:	09/17/2025	$0.00
Current Distribution Date:	10/20/2025	$0.00
Excess Liquidation Proceeds Reserve Account Balance
Prior Distribution Date:	09/17/2025	$0.00
Current Distribution Date:	10/20/2025	$0.00


Reports Available at sf.citidirect.com	v. 21.09.28	Page 18 of 42	© Copyright 2025 Citigroup

~~Item~~Citigroup ~~10.~~Commercial ~~Exhibits.~~Mortgage Trust 2017-B1 Commercial Mortgage Pass-Through Certificates, Series 2017-B1 COLLATERAL PERFORMANCE - DELINQUENCY AND LOAN STATUS DETAIL –

~~(a)~~November ~~The~~18, ~~following is a list of documents filed as part of this Form 10-D:~~ 2025

(99.1): Monthly report distributed to holders of the certificates issued by Citigroup Commercial Mortgage Trust 2017-B1, relating to the October 20, 2025 distribution.


							Delinquent
					(Does not include loans in Bankruptcy, Foreclosure, or REO)

			30	Day			60	Day			90	Day	120			+ Day	Bankruptcy				Foreclosure						REO

Distribution

Date	Count		Balance		Count		Balance		Count		Balance		Count		Balance		Count		Balance		Count		Balance		Count			Balance


	0		0		0		0		0		0		1		8,770,446		0		0		0		0		0			0
11/18/2025
	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%		0.0	%

	0		0		0		0		0		0		1		8,770,446		0		0		0		0		0			0
10/20/2025
	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%		0.0	%

	0		0		0		0		0		0		1		8,770,446		0		0		0		0		0			0
09/17/2025
	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%		0.0	%

	0		0		0		0		0		0		1		8,770,446		0		0		0		0		0			0
08/15/2025
	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%		0.0	%

	0		0		0		0		0		0		1		8,770,446		0		0		0		0		0			0
07/17/2025
	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%		0.0	%

	0		0		0		0		0		0		1		8,770,446		0		0		0		0		0			0
06/17/2025
	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%		0.0	%

	0		0		0		0		0		0		1		8,770,446		0		0		0		0		0			0
05/16/2025
	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%		0.0	%

	0		0		1		8,342,938		0		0		1		8,770,446		0		0		0		0		0			0
04/17/2025
	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%		0.0	%

	1		8,368,611		0		0		0		0		1		8,770,446		0		0		0		0		0			0
03/17/2025
	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%		0.0	%

	0		0		0		0		0		0		1		8,770,446		0		0		0		0		0			0
02/18/2025
	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%		0.0	%

	0		0		0		0		0		0		1		8,770,446		0		0		0		0		0			0
01/17/2025
	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%		0.0	%

	0		0		0		0		0		0		1		8,770,446		0		0		0		0		0			0
12/17/2024
	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	2.1	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%		0.0	%

~~(102):~~Reports ~~Asset~~Available ~~Data~~at ~~File~~sf.citidirect.com ~~(filed~~v. as21.09.28 ~~Exhibit~~Page ~~102~~19 toof ~~the~~42 ~~registrant’s~~© ~~Form~~Copyright ~~ABS-EE filed on October 30,~~ 2025 ~~under Commission File No. 333-207132-13 and incorporated by reference herein).~~ Citigroup

~~(103):~~Citigroup ~~Asset~~Commercial ~~related~~Mortgage ~~document~~Trust ~~(filed~~2017-B1 asCommercial ~~Exhibit~~Mortgage ~~103 to the registrant’s Form ABS~~Pass-EEThrough ~~filed on October 30~~Certificates, ~~2025~~Series ~~under Commission File No. 333~~2017-~~207132-13~~B1 ~~and~~APPRAISAL ~~incorporated~~REDUCTION ~~by reference herein).~~ DETAIL

~~(b)~~November ~~The~~18, ~~exhibits required to be filed by the Registrant pursuant to this Form 10-D are listed above and in the Exhibit Index that immediately precedes the signature page hereof.~~ 2025

EXHIBIT INDEX


			Beginning	Ending	Appraisal	Appraisal	Most Recent	Cumulative
Loan ID	OMCR	Property Name	Scheduled Balance	Scheduled Balance	Reduction Amount	Reduction Date	ASER Amount	ASER Amount

1647637	27	Clinton Crossings Medical Office	5,615,228.60	5,579,408.23	-	09/11/2025	-	-
304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
Total	Count = 2		14,385,674.71	14,349,854.34	7,228,068.59		-	571,999.49

Exhibit Number		Description
Exhibit 99.1		Monthly report distributed to holders of the certificates issued by Citigroup Commercial Mortgage Trust 2017-B1, relating to the October 20, 2025 distribution.
Exhibit 102		Asset Data File (filed as Exhibit 102 to the registrant’s Form ABS-EE filed on October 30, 2025 under Commission File No. 333-207132-13 and incorporated by reference herein).
Exhibit 103		Asset related document (filed as Exhibit 103 to the registrant’s Form ABS-EE filed on October 30, 2025 under Commission File No. 333-207132-13 and incorporated by reference herein).


Reports Available at sf.citidirect.com	v. 21.09.28	Page 20 of 42	© Copyright 2025 Citigroup

~~SIGNATURES~~Citigroup Commercial Mortgage Trust 2017-B1 Commercial Mortgage Pass-Through Certificates, Series 2017-B1 HISTORICAL APPRAISAL REDUCTION DETAIL

~~Pursuant~~November ~~to the requirements of the Securities Exchange Act of 1934~~18, ~~the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.~~ 2025

Citigroup Commercial Mortgage Securities Inc. (Depositor) /s/ Richard Simpson Richard Simpson, President


Distribution				Beginning	Ending	Appraisal	Appraisal	Most Recent	Cumulative
Date	Loan ID	OMCR	Property Name	Scheduled Balance Scheduled Balance Reduction Amount Reduction Date				ASER Amount	ASER Amount

11/18/2025	1647637	27	Clinton Crossings Medical Office	5,615,228.60	5,579,408.23	-	09/11/2025	-	-
11/18/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
10/20/2025	1647637	27	Clinton Crossings Medical Office	5,651,586.88	5,615,228.60	-	11/12/2024	-	-
10/20/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
9/17/2025	1647637	27	Clinton Crossings Medical Office	5,687,142.21	5,651,586.88	-	11/12/2024	-	-
9/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
8/15/2025	1647637	27	Clinton Crossings Medical Office	5,722,566.98	5,687,142.21	-	11/12/2024	-	-
8/15/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
7/17/2025	1647637	27	Clinton Crossings Medical Office	5,758,543.78	5,722,566.98	-	11/12/2024	-	-
7/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
6/17/2025	1647637	27	Clinton Crossings Medical Office	8,316,178.80	5,758,543.78	-	11/12/2024	-	-
6/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
5/16/2025	1647637	27	Clinton Crossings Medical Office	8,342,937.93	8,316,178.80	-	11/12/2024	-	-
5/16/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
4/17/2025	1647637	27	Clinton Crossings Medical Office	8,368,610.56	8,342,937.93	-	11/12/2024	-	-
4/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
3/17/2025	1647637	27	Clinton Crossings Medical Office	8,397,172.91	8,368,610.56	-	11/12/2024	-	-
3/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
2/18/2025	1647637	27	Clinton Crossings Medical Office	8,422,646.39	8,397,172.91	-	11/12/2024	-	-
2/18/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
1/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
12/17/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
11/18/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
10/18/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
9/17/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
8/16/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
7/17/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
6/17/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
5/17/2024	1647637	27	Clinton Crossings Medical Office	8,651,745.34	8,626,087.62	-	12/11/2023	-	-
5/17/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
4/17/2024	1647637	27	Clinton Crossings Medical Office	8,676,284.02	8,651,745.34	-	12/11/2023	-	-
4/17/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
3/15/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL APPRAISAL REDUCTION DETAIL

November 18, 2025


Distribution				Beginning	Ending	Appraisal	Appraisal	Most Recent	Cumulative
Date	Loan ID	OMCR	Property Name	Scheduled Balance Scheduled Balance Reduction Amount Reduction Date				ASER Amount	ASER Amount

2/16/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
1/18/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	4,876,065.98	02/13/2023	-	571,999.49
12/15/2023	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	4,876,065.98	02/13/2023	-	571,999.49
11/17/2023	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	4,876,065.98	02/13/2023	-	571,999.49
10/17/2023	304101859	30	4901 West Irving Park	8,786,300.63	8,770,446.11	4,876,065.98	02/13/2023	19,930.92	571,999.49
9/15/2023	304101859	30	4901 West Irving Park	8,800,895.09	8,786,300.63	4,876,065.98	02/13/2023	20,595.28	552,068.57
8/17/2023	304101859	30	4901 West Irving Park	8,815,428.10	8,800,895.09	4,876,065.98	02/13/2023	20,595.28	531,473.29
7/17/2023	304101859	30	4901 West Irving Park	8,831,099.32	8,815,428.10	4,876,065.98	02/13/2023	19,930.92	510,878.01
6/16/2023	304101859	30	4901 West Irving Park	8,845,505.16	8,831,099.32	4,876,065.98	02/13/2023	20,595.29	490,947.09
5/17/2023	304101859	30	4901 West Irving Park	8,861,053.81	8,845,505.16	4,876,065.98	02/13/2023	19,930.92	470,351.80
4/17/2023	1647637	27	Clinton Crossings Medical Office	8,969,923.99	8,946,467.53	-	12/12/2022	-	-
4/17/2023	304101859	30	4901 West Irving Park	8,875,333.54	8,861,053.81	4,876,065.98	02/13/2023	20,595.28	450,420.88
3/17/2023	304101859	30	4901 West Irving Park	8,893,176.62	8,875,333.54	4,876,065.98	02/13/2023	18,602.19	429,825.60
2/17/2023	304101859	30	4901 West Irving Park	8,907,321.10	8,893,176.62	4,876,065.98	02/13/2023	20,595.29	411,223.41
1/18/2023	304101859	30	4901 West Irving Park	8,921,406.03	8,907,321.10	3,964,600.49	02/11/2022	16,745.48	390,628.12
12/16/2022	304101859	30	4901 West Irving Park	8,936,645.39	8,921,406.03	3,964,600.49	02/11/2022	16,205.30	373,882.64
11/18/2022	304101859	30	4901 West Irving Park	8,950,606.86	8,936,645.39	3,964,600.49	02/11/2022	16,745.48	357,677.34
10/17/2022	304101859	30	4901 West Irving Park	8,965,727.22	8,950,606.86	3,964,600.49	02/11/2022	16,205.30	340,931.86
9/16/2022	304101859	30	4901 West Irving Park	8,979,566.25	8,965,727.22	3,964,600.49	02/11/2022	16,745.48	324,726.56
8/17/2022	304101859	30	4901 West Irving Park	8,993,347.01	8,979,566.25	3,964,600.49	02/11/2022	16,745.48	307,981.08
7/15/2022	304101859	30	4901 West Irving Park	9,008,293.21	8,993,347.01	3,964,600.49	02/11/2022	16,205.31	291,235.60
6/17/2022	304101859	30	4901 West Irving Park	9,021,953.02	9,008,293.21	3,964,600.49	02/11/2022	16,745.48	275,030.29
5/17/2022	304101859	30	4901 West Irving Park	9,036,782.65	9,021,953.02	3,964,600.49	02/11/2022	16,205.30	258,284.81
4/15/2022	304101859	30	4901 West Irving Park	9,050,322.51	9,036,782.65	3,964,600.49	02/11/2022	16,745.48	242,079.51
3/17/2022	304101859	30	4901 West Irving Park	9,067,499.87	9,050,322.51	3,964,600.49	02/11/2022	15,124.95	225,334.03
2/17/2022	304101859	30	4901 West Irving Park	9,080,910.41	9,067,499.87	3,964,600.49	02/11/2022	16,745.48	210,209.08
1/18/2022	304101859	30	4901 West Irving Park	9,094,264.48	9,080,910.41	2,716,535.50	03/11/2021	11,473.97	193,463.60
12/17/2021	304101859	30	4901 West Irving Park	9,108,799.44	9,094,264.48	2,716,535.50	03/11/2021	11,103.84	181,989.63
11/18/2021	304101859	30	4901 West Irving Park	9,122,036.09	9,108,799.44	2,716,535.50	03/11/2021	11,473.97	170,885.79
10/18/2021	304101859	30	4901 West Irving Park	9,136,457.88	9,122,036.09	2,716,535.50	03/11/2021	11,103.84	159,411.82
9/17/2021	304101859	30	4901 West Irving Park	9,149,578.09	9,136,457.88	2,716,535.50	03/11/2021	11,473.97	148,307.98
8/17/2021	304101859	30	4901 West Irving Park	9,162,643.06	9,149,578.09	2,716,535.50	03/11/2021	11,473.97	136,834.01
7/16/2021	304101859	30	4901 West Irving Park	9,176,899.38	9,162,643.06	2,716,535.50	03/11/2021	11,103.84	125,360.04


Reports Available at sf.citidirect.com	v. 21.09.28	Page 22 of 42	© Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL APPRAISAL REDUCTION DETAIL

November 18, 2025


Distribution				Beginning	Ending	Appraisal	Appraisal	Most Recent		Cumulative
Date	Loan ID	OMCR	Property Name	Scheduled Balance Scheduled Balance Reduction Amount Reduction Date				ASER Amount		ASER Amount

6/17/2021	304101859	30	4901 West Irving Park	9,189,849.32	9,176,899.38	2,716,535.50	03/11/2021	11,473.97		114,256.20
5/17/2021	304101859	30	4901 West Irving Park	9,203,994.77	9,189,849.32	2,716,535.50	03/11/2021	11,103.84		102,782.23
5/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	52,238,198.79	52,142,057.56	-		(152,355.24	)	-
4/16/2021	304101859	30	4901 West Irving Park	9,216,830.63	9,203,994.77	2,716,535.50	03/11/2021	11,473.97		91,678.39
4/16/2021	304101861	4	Old Town San Diego Hotel Portfolio	52,327,266.50	52,238,198.79	13,176,669.56	12/11/2020	-		152,355.24
3/17/2021	1648607	24	Hotel Indigo El Paso	10,395,520.76	10,376,494.06	-		(10,601.99	)	-
3/17/2021	304101859	30	4901 West Irving Park	9,233,374.53	9,216,830.63	2,716,535.50	03/11/2021	10,363.58		80,204.42
3/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	52,436,131.77	52,327,266.50	13,176,669.56	12/11/2020	47,399.41		152,355.24
2/18/2021	1648607	24	Hotel Indigo El Paso	10,410,402.46	10,395,520.76	-	12/11/2020	-		10,601.99
2/18/2021	304101859	30	4901 West Irving Park	9,246,086.69	9,233,374.53	1,675,140.96	04/13/2020	7,075.38		69,840.84
2/18/2021	304101861	4	Old Town San Diego Hotel Portfolio	52,524,413.46	52,436,131.77	13,176,669.56	12/11/2020	52,477.92		104,955.83
1/15/2021	1648607	24	Hotel Indigo El Paso	10,425,223.98	10,410,402.46	-	12/11/2020	-		10,601.99
1/15/2021	304101859	30	4901 West Irving Park	9,258,745.33	9,246,086.69	1,675,140.96	04/13/2020	7,075.38		62,765.46
1/15/2021	304101861	4	Old Town San Diego Hotel Portfolio	52,612,344.58	52,524,413.46	13,176,669.56	12/11/2020	52,477.91		52,477.91
12/17/2020	1648607	24	Hotel Indigo El Paso	10,441,347.57	10,425,223.98	-	12/11/2020	-		10,601.99
12/17/2020	304101859	30	4901 West Irving Park	9,272,610.03	9,258,745.33	1,675,140.96	04/13/2020	6,847.14		55,690.08
12/17/2020	304101861	4	Old Town San Diego Hotel Portfolio	52,706,678.26	52,612,344.58	13,176,669.56	12/11/2020	-		-
11/18/2020	1648607	24	Hotel Indigo El Paso	10,456,043.96	10,441,347.57	2,614,010.99	11/12/2020	10,601.99		10,601.99
11/18/2020	304101859	30	4901 West Irving Park	9,285,157.00	9,272,610.03	1,675,140.96	04/13/2020	7,075.38		48,842.94
10/19/2020	304101859	30	4901 West Irving Park	9,298,914.07	9,285,157.00	1,675,140.96	04/13/2020	6,847.14		41,767.56
9/17/2020	304101859	30	4901 West Irving Park	9,311,350.29	9,298,914.07	1,675,140.96	04/13/2020	7,075.38		34,920.42
8/17/2020	304101859	30	4901 West Irving Park	9,323,734.15	9,311,350.29	1,675,140.96	04/13/2020	7,075.38		27,845.04
7/17/2020	304101859	30	4901 West Irving Park	9,337,334.02	9,323,734.15	1,675,140.96	04/13/2020	6,847.14		20,769.66
6/17/2020	304101859	30	4901 West Irving Park	9,349,608.49	9,337,334.02	1,675,140.96	04/13/2020	7,075.38		13,922.52
5/15/2020	304101859	30	4901 West Irving Park	9,363,102.92	9,349,608.49	1,675,140.96	04/13/2020	6,847.14		6,847.14
4/17/2020	304101859	30	4901 West Irving Park	9,375,268.89	9,363,102.92	1,675,140.96	04/13/2020	-		-


Reports Available at sf.citidirect.com	v. 21.09.28	Page 23 of 42	© Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

LOAN MODIFICATION DETAIL

November 18, 2025


				Modification	Modification
Loan ID		OMCR	Property Name	Date	Code (4)

1749833		13	DoubleTree Lafayette	04/01/2020	8
1648607		24	Hotel Indigo El Paso	07/01/2020	8
304101861		4	Old Town San Diego Hotel Portfolio	06/01/2020	8
Total	Count = 3


Reports Available at sf.citidirect.com	v. 21.09.28	Page 24 of 42	© Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

November 18, 2025


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

11/18/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
11/18/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
11/18/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
10/20/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
10/20/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
10/20/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
09/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
09/17/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
08/15/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/15/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
08/15/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
07/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
07/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
07/17/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
06/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
06/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
06/17/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
05/16/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
05/16/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
05/16/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
04/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
04/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
04/17/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
03/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
03/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
03/17/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
02/18/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
02/18/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
02/18/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
01/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
01/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8


01/17/2025	304101861		4 Old Town San Diego Hotel Portfolio	06/01/2020	8
Reports Available at sf.citidirect.com		v. 21.09.28	Page 25 of 42		© Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

November 18, 2025


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

12/17/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
12/17/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
12/17/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
11/18/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
11/18/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
11/18/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
10/18/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
10/18/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
10/18/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
09/17/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/17/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
09/17/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
08/16/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/16/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
08/16/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
07/17/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
07/17/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
07/17/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
06/17/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
06/17/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
06/17/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
05/17/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
05/17/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
05/17/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
04/17/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
04/17/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
04/17/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
03/15/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
03/15/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
03/15/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
02/16/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
02/16/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
02/16/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 26 of 42	© Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

November 18, 2025


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

01/18/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
01/18/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
01/18/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
12/15/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
12/15/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
12/15/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
11/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
11/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
11/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
10/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
10/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
10/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
09/15/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/15/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
09/15/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
08/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
08/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
07/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
07/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
07/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
06/16/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
06/16/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
06/16/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
05/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
05/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
05/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
04/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
04/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
04/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
03/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
03/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
03/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 27 of 42	© Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

November 18, 2025


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

02/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
02/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
02/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
01/18/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
01/18/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
01/18/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
12/16/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
12/16/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
12/16/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
11/18/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
11/18/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
11/18/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
10/17/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
10/17/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
10/17/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
09/16/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/16/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
09/16/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
08/17/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/17/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
08/17/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
07/15/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
07/15/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
07/15/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
06/17/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
06/17/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
06/17/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
05/17/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
05/17/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
05/17/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
04/15/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
04/15/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
04/15/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 28 of 42	© Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

November 18, 2025


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

03/17/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
03/17/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
03/17/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
02/17/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
02/17/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
02/17/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
01/18/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
01/18/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
01/18/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
12/17/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
12/17/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
12/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
11/18/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
11/18/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
11/18/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
10/18/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
10/18/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
10/18/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
09/17/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/17/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
09/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
08/17/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/17/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
08/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
07/16/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
07/16/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
07/16/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
06/17/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
06/17/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
06/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
05/17/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
05/17/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
05/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 29 of 42	© Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

November 18, 2025


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

04/16/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
04/16/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
04/16/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
03/17/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
03/17/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
02/18/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
02/18/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
01/15/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
01/15/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
12/17/2020	1749833	13	DoubleTree Lafayette	04/01/2020	8
11/18/2020	1749833	13	DoubleTree Lafayette	04/01/2020	8
10/19/2020	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/17/2020	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/17/2020	1749833	13	DoubleTree Lafayette	04/01/2020	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 30 of 42	© Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

SPECIALLY SERVICED LOAN DETAIL

November 18, 2025


			Special Servicing	Ending	Ending	Most	Most Recent	Most Recent	Most Recent
		Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special Servicer	Master Servicer
Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

1647637	27	11	3,500.00	5,579,408.23	5,615,228.60	16,000,000.00	08/05/2025	09/20/2021
304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
Total	Count = 2		7,000.00	14,349,854.34	15,017,215.83	22,100,000.00


Reports Available at sf.citidirect.com	v. 21.09.28	Page 31 of 42	© Copyright 2025 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL SPECIALLY SERVICED LOANS


November 18, 2025




Most Recent	Most Recent
Servicer	Master Servicer


				Special Servicing	Ending	Ending	Most	Most Recent
Distribution			Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special
Date	Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

11/18/2025	1647637	27	11	3,500.00	5,579,408.23	5,615,228.60	16,000,000.00	08/05/2025	09/20/2021
10/20/2025	1647637	27	11	3,500.00	5,615,228.60	5,615,228.60	16,000,000.00	08/05/2025	09/20/2021
09/17/2025	1647637	27	11	3,500.00	5,651,586.88	5,687,142.21	16,000,000.00	08/05/2025	09/20/2021
08/15/2025	1647637	27	11	3,500.00	5,687,142.21	5,687,142.21	16,200,000.00	09/17/2024	09/20/2021
07/17/2025	1647637	27	11	3,500.00	5,722,566.98	5,722,566.98	16,200,000.00	09/17/2024	09/20/2021
06/17/2025	1647637	27	11	3,500.00	5,758,543.78	5,784,409.65	16,200,000.00	09/17/2024	09/20/2021
05/16/2025	1647637	27	11	3,500.00	8,316,178.80	8,316,178.80	16,200,000.00	09/17/2024	09/20/2021
04/17/2025	1647637	27	11	3,500.00	8,342,937.93	8,422,646.39	16,200,000.00	09/17/2024	09/20/2021
03/17/2025	1647637	27	11	3,500.00	8,368,610.56	8,422,646.39	16,200,000.00	09/17/2024	09/20/2021
02/18/2025	1647637	27	11	3,500.00	8,397,172.91	8,422,646.39	16,200,000.00	09/17/2024	09/20/2021
01/17/2025	1647637	27	11	3,500.00	8,422,646.39	8,448,026.33	16,200,000.00	09/17/2024	09/20/2021
12/17/2024	1647637	27	11	3,500.00	8,448,026.33	8,474,316.88	16,200,000.00	09/17/2024	09/20/2021
11/18/2024	1647637	27	11	3,500.00	8,474,316.88	8,499,507.08	16,200,000.00	09/17/2024	09/20/2021
10/18/2024	1647637	27	11	3,500.00	8,499,507.08	8,499,507.08	16,400,000.00	10/24/2023	09/20/2021
09/17/2024	1647637	27	11	3,500.00	8,525,614.66	8,525,614.66	16,400,000.00	10/24/2023	09/20/2021
08/16/2024	1647637	27	11	3,500.00	8,550,616.50	8,550,616.50	16,400,000.00	10/24/2023	09/20/2021
07/17/2024	1647637	27	11	3,500.00	8,575,526.53	8,575,526.53	16,400,000.00	10/24/2023	09/20/2021
06/17/2024	1647637	27	11	3,500.00	8,601,363.94	8,626,087.62	16,400,000.00	10/24/2023	09/20/2021
05/17/2024	1647637	27	11	3,500.00	8,626,087.62	8,626,087.62	16,400,000.00	10/24/2023	09/20/2021
04/17/2024	1647637	27	11	3,500.00	8,651,745.34	8,676,284.02	16,400,000.00	10/24/2023	09/20/2021
03/15/2024	1647637	27	11	3,500.00	8,676,284.02	8,676,284.02	16,400,000.00	10/24/2023	09/20/2021
02/16/2024	1647637	27	11	3,500.00	8,702,794.33	8,702,794.33	16,400,000.00	10/24/2023	09/20/2021
01/18/2024	1647637	27	11	3,500.00	8,727,145.56	8,751,407.37	16,400,000.00	10/24/2023	09/20/2021
12/15/2023	1647637	27	11	3,500.00	8,751,407.37	8,776,619.70	16,400,000.00	10/24/2023	09/20/2021
11/17/2023	1647637	27	11	3,500.00	8,776,619.70	8,776,619.70	18,200,000.00	12/01/2022	09/20/2021
10/17/2023	1647637	27	11	3,500.00	8,800,699.84	8,825,736.99	18,200,000.00	12/01/2022	09/20/2021
09/15/2023	1647637	27	11	3,500.00	8,825,736.99	8,825,736.99	18,200,000.00	12/01/2022	09/20/2021
08/17/2023	1647637	27	11	3,500.00	8,849,636.77	8,849,636.77	18,200,000.00	12/01/2022	09/20/2021
07/17/2023	1647637	27	11	3,500.00	8,873,448.79	8,898,227.39	18,200,000.00	12/01/2022	09/20/2021
06/16/2023	1647637	27	11	3,500.00	8,898,227.39	8,898,227.39	18,200,000.00	12/01/2022	09/20/2021
05/17/2023	1647637	27	11	3,500.00	8,921,860.99	8,946,467.53	18,200,000.00	12/01/2022	09/20/2021
04/17/2023	1647637	27	11	3,500.00	8,946,467.53	8,946,467.53	18,200,000.00	12/01/2022	09/20/2021


Reports Available at sf.citidirect.com	v. 21.09.28	Page 32 of 42	© Copyright 2025 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1									November 18, 2025

HISTORICAL SPECIALLY SERVICED LOANS


				Special Servicing	Ending	Ending	Most	Most Recent	Most Recent	Most Recent
Distribution			Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special Servicer Master Servicer
Date	Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

03/17/2023	1647637	27	11	3,500.00	8,969,923.99	8,969,923.99	18,200,000.00	12/01/2022	09/20/2021
02/17/2023	1647637	27	11	3,500.00	8,996,491.28	8,996,491.28	18,200,000.00	12/01/2022	09/20/2021
01/18/2023	1647637	27	11	3,500.00	9,019,764.05	9,019,764.05	18,200,000.00	12/01/2022	09/20/2021
12/16/2022	1647637	27	11	3,500.00	9,042,951.36	9,042,951.36	18,200,000.00	12/01/2022	09/20/2021
11/18/2022	1647637	27	11	3,500.00	9,067,127.55	9,067,127.55	17,100,000.00	05/05/2017	09/20/2021
10/17/2022	1647637	27	11	3,500.00	9,090,140.94	9,090,140.94	17,100,000.00	05/05/2017	09/20/2021
09/16/2022	1647637	27	11	3,500.00	9,114,149.42	9,114,149.42	17,100,000.00	05/05/2017	09/20/2021
08/17/2022	1647637	27	11	3,500.00	9,136,990.15	9,159,747.00	17,100,000.00	05/05/2017	09/20/2021
07/15/2022	1647637	27	11	3,500.00	9,159,747.00	9,183,508.10	17,100,000.00	05/05/2017	09/20/2021
06/17/2022	1647637	27	11	3,500.00	9,183,508.10	9,183,508.10	17,100,000.00	05/05/2017	09/20/2021
05/17/2022	1647637	27	11	3,500.00	9,206,094.14	9,252,106.98	17,100,000.00	05/05/2017	09/20/2021
04/15/2022	1647637	27	11	3,500.00	9,229,690.52	9,252,106.98	17,100,000.00	05/05/2017	09/20/2021
03/17/2022	1647637	27	11	3,500.00	9,252,106.98	9,277,738.03	17,100,000.00	05/05/2017	09/20/2021
02/17/2022	1647637	27	13	3,500.00	9,277,738.03	9,299,978.05	17,100,000.00	05/05/2017	09/20/2021
01/18/2022	1647637	27	13	3,500.00	9,299,978.05	9,299,978.05	17,100,000.00	05/05/2017	09/20/2021
12/17/2021	1647637	27	13	3,500.00	9,322,136.41	9,322,136.41	17,100,000.00	05/05/2017	09/20/2021
11/18/2021	1647637	27	13	3,500.00	9,345,320.38	9,345,320.38	17,100,000.00	05/05/2017	09/20/2021
10/18/2021	1647637	27	13	3,500.00	9,367,312.24	9,367,312.24	17,100,000.00	05/05/2017	09/20/2021
03/17/2021	1648607	24	8	-	10,376,494.06	10,376,494.06	12,800,000.00	09/28/2020	08/10/2020	02/11/2021
02/18/2021	1648607	24	1	-	10,395,520.76	10,395,520.76	12,800,000.00	09/28/2020	08/10/2020
01/15/2021	1648607	24	1	-	10,410,402.46	10,425,223.98	12,800,000.00	09/28/2020	08/10/2020
12/17/2020	1648607	24	1	-	10,425,223.98	10,516,958.99	12,800,000.00	09/28/2020	08/10/2020
11/18/2020	1648607	24	1	-	10,441,347.57	10,531,349.63	20,700,000.00	02/01/2017	08/10/2020
10/19/2020	1648607	24	1	-	10,456,043.96	10,531,349.63	20,700,000.00	02/01/2017	08/10/2020
09/17/2020	1648607	24	13	-	10,472,046.92	10,531,349.63	20,700,000.00	02/01/2017	08/10/2020
08/17/2020	1648607	24	13	-	10,486,619.17	10,531,349.63	20,700,000.00	02/01/2017	08/10/2020
11/18/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
10/20/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
09/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
08/15/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
07/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
06/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
Reports Available at sf.citidirect.com			v. 21.09.28		Page 33 of 42				© Copyright 2025 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1									November 18, 2025

HISTORICAL SPECIALLY SERVICED LOANS


				Special Servicing	Ending	Ending	Most	Most Recent	Most Recent	Most Recent
Distribution			Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special Servicer Master Servicer
Date	Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

05/16/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
04/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
03/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
02/18/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
01/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
12/17/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
11/18/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
10/18/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
09/17/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
08/16/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
07/17/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
06/17/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
05/17/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
04/17/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
03/15/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
02/16/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
01/18/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
12/15/2023	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
11/17/2023	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
10/17/2023	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
09/15/2023	304101859	30	2	3,500.00	8,786,300.63	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
08/17/2023	304101859	30	2	3,500.00	8,800,895.09	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
07/17/2023	304101859	30	2	3,500.00	8,815,428.10	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
06/16/2023	304101859	30	2	3,500.00	8,831,099.32	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
05/17/2023	304101859	30	2	3,500.00	8,845,505.16	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
04/17/2023	304101859	30	2	3,500.00	8,861,053.81	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
03/17/2023	304101859	30	2	3,500.00	8,875,333.54	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
02/17/2023	304101859	30	2	3,500.00	8,893,176.62	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
01/18/2023	304101859	30	2	3,500.00	8,907,321.10	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
12/16/2022	304101859	30	2	3,500.00	8,921,406.03	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
11/18/2022	304101859	30	2	3,500.00	8,936,645.39	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
10/17/2022	304101859	30	2	3,500.00	8,950,606.86	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
Reports Available at sf.citidirect.com			v. 21.09.28		Page 34 of 42				© Copyright 2025 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1									November 18, 2025

HISTORICAL SPECIALLY SERVICED LOANS


				Special Servicing	Ending	Ending	Most	Most Recent	Most Recent	Most Recent
Distribution			Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special Servicer Master Servicer
Date	Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

09/16/2022	304101859	30	2	3,500.00	8,965,727.22	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
08/17/2022	304101859	30	2	3,500.00	8,979,566.25	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
07/15/2022	304101859	30	2	3,500.00	8,993,347.01	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
06/17/2022	304101859	30	2	3,500.00	9,008,293.21	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
05/17/2022	304101859	30	2	3,500.00	9,021,953.02	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
04/15/2022	304101859	30	2	3,500.00	9,036,782.65	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
03/17/2022	304101859	30	2	3,500.00	9,050,322.51	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
02/17/2022	304101859	30	2	3,500.00	9,067,499.87	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
01/18/2022	304101859	30	2	3,500.00	9,080,910.41	9,401,987.23	8,330,000.00	01/14/2021	01/21/2020
12/17/2021	304101859	30	2	3,500.00	9,094,264.48	9,401,987.23	8,330,000.00	01/14/2021	01/21/2020
11/18/2021	304101859	30	2	3,500.00	9,108,799.44	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
10/18/2021	304101859	30	2	3,500.00	9,122,036.09	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
09/17/2021	304101859	30	2	3,500.00	9,136,457.88	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
08/17/2021	304101859	30	2	3,500.00	9,149,578.09	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
07/16/2021	304101859	30	2	3,500.00	9,162,643.06	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
06/17/2021	304101859	30	2	3,500.00	9,176,899.38	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
05/17/2021	304101859	30	2	3,500.00	9,189,849.32	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
04/16/2021	304101859	30	2	3,500.00	9,203,994.77	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
03/17/2021	304101859	30	2	3,500.00	9,216,830.63	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
02/18/2021	304101859	30	2	3,500.00	9,233,374.53	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
01/15/2021	304101859	30	2	3,500.00	9,246,086.69	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
12/17/2020	304101859	30	2	3,500.00	9,258,745.33	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
11/18/2020	304101859	30	2	3,500.00	9,272,610.03	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
10/19/2020	304101859	30	2	3,500.00	9,285,157.00	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
09/17/2020	304101859	30	2	3,500.00	9,298,914.07	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
08/17/2020	304101859	30	2	3,500.00	9,311,350.29	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
07/17/2020	304101859	30	2	3,500.00	9,323,734.15	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
06/17/2020	304101859	30	2	3,500.00	9,337,334.02	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
05/15/2020	304101859	30	2	3,500.00	9,349,608.49	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
04/17/2020	304101859	30	13	3,500.00	9,363,102.92	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
03/17/2020	304101859	30	13	3,500.00	9,375,268.89	9,413,989.49	13,900,000.00	02/15/2017	01/21/2020
02/18/2020	304101859	30	13	3,500.00	9,389,934.22	9,439,117.59	13,900,000.00	02/15/2017	01/21/2020
Reports Available at sf.citidirect.com			v. 21.09.28		Page 35 of 42				© Copyright 2025 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1										November 18, 2025

HISTORICAL SPECIALLY SERVICED LOANS


				Special Servicing		Ending	Ending	Most	Most Recent	Most Recent	Most Recent
Distribution			Workout	Fee Amount		Scheduled	Actual	Recent	Valuation	Special Servicer	Master Servicer
Date	Loan ID	OMCR	Strategy (3)	Plus Adjustments		Balance	Balance	Value	Date	Transfer Date	Return Date

05/17/2021	304101861	4	8	5,441.48		52,142,057.56	52,142,057.56	65,600,000.00	10/29/2020	08/19/2020	04/21/2021
04/16/2021	304101861	4	1	(72,815.41	)	52,238,198.79	52,327,266.50	82,000,000.00	07/06/2017	08/19/2020
03/17/2021	304101861	4	1	10,195.91		52,327,266.50	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
02/18/2021	304101861	4	13	11,307.34		52,436,131.77	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
01/15/2021	304101861	4	13	11,326.27		52,524,413.46	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
12/17/2020	304101861	4	13	10,980.56		52,612,344.58	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
11/18/2020	304101861	4	13	11,365.35		52,706,678.26	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
10/19/2020	304101861	4	13	11,018.23		52,793,885.58	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
09/17/2020	304101861	4	13	6,621.75		52,887,521.50	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
05/15/2020	307971614	23	8	-		11,908,830.85	11,908,830.85	55,750,000.00	04/07/2017		04/17/2020




Reports Available at sf.citidirect.com			v. 21.09.28			Page 36 of 42				© Copyright 2025 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1							November 18, 2025
UNSCHEDULED PRINCIPAL DETAIL


		Liquidation /	Liquid / Prepay	Principal	Principal	Prepayment Interest	Prepayment	Yield Maintenance
Loan ID	OMCR	Prepayment Date	Code (5)	Collections	Adjustments	Excess / (Shortfall)	Penalties (PPP)	Penalties (YM)
No Loans with Unscheduled Principal Activity to Report.




Reports Available at sf.citidirect.com v. 21.09.28				Page 37 of 42			© Copyright 2025 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1								November 18, 2025

HISTORICAL UNSCHEDULED PRINCIPAL DETAIL


Distribution			Liquidation /	Liquid / Prepay	Principal	Principal	Prepayment Interest	Prepayment	Yield Maintenance
Date	Loan ID	OMCR	Prepayment Date	Code (5)	Collections	Adjustments	Excess / (Shortfall)	Penalties (PPP)	Penalties (YM)

6/17/2025	1647637	27	06/01/2025	1	2,531,769.15	-	-	-	-
4/17/2025	308511028	28	04/11/2025	2	8,807,720.12	-	-	-	-
7/17/2023	300801627	44	06/28/2023	9	4,540,137.60	-	-	-	45,473.64
6/17/2022	307971614	23	06/03/2022	5	11,446,234.79	-	-	-	-
5/17/2022	304101836	6	05/03/2022	2	42,000,000.00	-	-	-	-
9/17/2019	1749084	22	08/01/2018	11	3,156,779.24	-	-	-	254,846.27




Reports Available at sf.citidirect.com		v. 21.09.28			Page 38 of 42			© Copyright 2025 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1										November 18, 2025
LIQUIDATED LOAN DETAIL


		Beginning	Most	Liquidation	Net		Net	Realized	Date of		Loss with
		Scheduled	Recent	Sales	Proceeds	Liquidation	Proceeds	Loss to	Current	Current Cumulative	Cumulative
Loan ID	OMCR	Balance	Value	Price	Received	Expense	Available	Trust	Adj. to Loan	Adj. to Loan Adj. to Loan	Adj. to Trust
No Loans liquidated to Report.




Reports Available at sf.citidirect.com		v. 21.09.28				Page 39 of 42				© Copyright 2025 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1										November 18, 2025
HISTORICAL LIQUIDATED LOAN


		Beginning	Most	Liquidation	Net		Net	Realized	Date of		Loss with
Distribution		Scheduled	Recent	Sales	Proceeds	Liquidation	Proceeds	Loss to	Current	Current Cumulative	Cumulative
Date	Loan ID OMCR	Balance	Value	Price	Received	Expense	Available	Trust	Adj. to Loan	Adj. to Loan Adj. to Loan	Adj. to Trust
No Loans liquidated to Report.




Reports Available at sf.citidirect.com		v. 21.09.28				Page 40 of 42				© Copyright 2025 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1					November 18, 2025

CREFC® INVESTOR REPORTING PACKAGE LEGENDS

1\|CREFC Investor Reporting Package Legends
	Property Type (1)		Workout Strategy (3)		Liquidation/Prepayment Code (5)

MF	Multifamily	1	Modification	1	Partial Liquidation (Curtailment)
RT	Retail	2	Foreclosure	2	Payoff Prior To Maturity
HC	HealthCare	3	Bankruptcy	3	Disposition / Liquidation
IN	Industrial	4	Extension	4	Repurchase / Substitution
MH	Mobile Home Park	5	Note Sale	5	Full Payoff At Maturity
OF	Office	6	DPO	6	DPO
MU	Mixed Use	7	REO	7	Liquidation prior to 7/1/2006
LO	Lodging	8	Resolved	8	Payoff With Penalty
SS	Self Storage	9	Pending Return to Master Servicer	9	Payoff With Yield Maintenance
SE	Securities	10	Deed In Lieu of Foreclosure	10	Curtailment With Penalty
CH	Cooperative Housing	11	Full Payoff	11	Curtailment With Yield Maintenance
ZZ	Missing Information	12	Reps and Warranties
SF	SF	13	TBD
WH	Warehouse	98	Other
OT	Other

Modification Code (4)

	Payment Status of Loan (2)
		1	Maturity Date Extension
A	In Grace Period	2	Amortization Change
B	Late, but less than 30 Days	3	Principal Write-Off
0	Current	4	Blank (formerly Combination)
1	30-59 Days Delinquent	5	Temporary Rate Reduction
2	60-89 Days Delinquent	6	Capitalization of Interest
3	90-120 Days Delinquent	7	Capitalization of Taxes
4	Performing Matured Balloon	8	Other
5	Non Performing Matured Balloon	9	Combination
6	121+ Days Delinquent	10	Forbearance




Reports Available at sf.citidirect.com		v. 21.09.28	Page 41 of 42		© Copyright 2025 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1			November 18, 2025
NOTES
No Notes available for this deal at this time.




Reports Available at sf.citidirect.com	v. 21.09.28	Page 42 of 42

Filing Compare · CITIGROUP COMMERCIAL MORTGAGE TRUST 2017-B1