10-D 1 csc06c01_10d-200606.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549 FORM 10-D ASSET-BACKED ISSUER DISTRIBUTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the monthly distribution period from: May 18, 2006 to June 16, 2006 Commission File Number of issuing entity: 333-129918-01 Credit Suisse Commercial Mortgage Trust 2006-C1 (Exact name of issuing entity as specified in its charter) Commission File Number of depositor:333-129918 Credit Suisse First Boston Mortgage Securities Corp. (Exact name of depositor as specified in its charter) Column Financial, Inc. KeyBank National Association NCB, FSB GMAC Commercial Mortgage Corporation (Exact name of sponsor as specified in its charter) New York (State or other jurisdiction of incorporation or organization of the issuing entity) 54-2196515 54-2196516 54-2196517 54-6708164 (I.R.S. Employer Identification No.) c/o Wells Fargo Bank, N.A. 9062 Old Annapolis Road Columbia, MD 21045 (Address of principal executive offices of the issuing entity) (Zip Code) (410) 884-2000 (Telephone number, including area code) Not Applicable (Former name, former address, if changed since last report) Registered/reporting pursuant to (check one) Title of Section Section Section Name of Exchange Class 12(b) 12(g) 15(d) (If Section 12(b)) A-1 ______ ______ ___X___ ___________ A-2 ______ ______ ___X___ ___________ A-3 ______ ______ ___X___ ___________ A-AB ______ ______ ___X___ ___________ A-4 ______ ______ ___X___ ___________ A-1A ______ ______ ___X___ ___________ A-M ______ ______ ___X___ ___________ A-J ______ ______ ___X___ ___________ B ______ ______ ___X___ ___________ C ______ ______ ___X___ ___________ D ______ ______ ___X___ ___________ E ______ ______ ___X___ ___________ F ______ ______ ___X___ ___________ G ______ ______ ___X___ ___________ H ______ ______ ___X___ ___________ J ______ ______ ___X___ ___________ K ______ ______ ___X___ ___________ L ______ ______ ___X___ ___________ M ______ ______ ___X___ ___________ N ______ ______ ___X___ ___________ O ______ ______ ___X___ ___________ P ______ ______ ___X___ ___________ Q ______ ______ ___X___ ___________ S ______ ______ ___X___ ___________ CCA ______ ______ ___X___ ___________ R ______ ______ ___X___ ___________ LR ______ ______ ___X___ ___________ V ______ ______ ___X___ ___________ R-I ______ ______ ___X___ ___________ A-X ______ ______ ___X___ ___________ A-Y ______ ______ ___X___ ___________

Indicate 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), and (2) has been subject to such filing requirements for the past 90 days. Yes __X__ No ____ Part I - DISTRIBUTION INFORMATION Item 1. Distribution and Pool Performance Information On June 16, 2006 a distribution was made to holders of Credit Suisse Commercial Mortgage Trust 2006-C1. The distribution report is attached as an Exhibit to this Form 10-D, please see Item 9(b), Exhibit 99.1 for the related information. Part II - OTHER INFORMATION Item 9. Exhibits. (a) The following is a list of documents filed as part of this Report on Form 10-D: (99.1) Monthly report distributed to holders of Credit Suisse Commercial Mortgage Trust 2006-C1, relating to the June 16, 2006 distribution. (b) The exhibits required to be filed by Registrant pursuant to Item 601 of Regulation S-K are listed above and in the Exhibit Index that immediately follows the signature page hereof. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. Credit Suisse First Boston Mortgage Securities Corp. (Depositor) /s/ Jeffrey A. Altabef Jeffrey A. Altabef, Vice President Date: June 26, 2006 EXHIBIT INDEX Exhibit Number Description EX-99.1 Monthly report distributed to holders of Credit Suisse Commercial Mortgage Trust 2006-C1, relating to the June 16, 2006 distribution. EX-99.1 Wells Fargo Bank, N.A. Corporate Trust Services 9062 Old Annapolis Road Columbia, MD 21045-1951 Credit Suisse Commercial Mortgage Trust Commercial Mortgage Pass-Through Certificates Series 2006-C1 For Additional Information, please contact CTSLink Customer Service (301) 815-6600 Reports Available on the World Wide Web @ www.ctslink.com/cmbs Payment Date: June 16, 2006 Record Date: May 31, 2006 Determination Date: June 12, 2006 DISTRIBUTION DATE STATEMENT Table of Contents STATEMENT SECTIONS PAGE(s) Certificate Distribution Detail 2 Certificate Factor Detail 3 Reconciliation Detail 4 Other Required Information 5 Cash Reconciliation 6 Ratings Detail 7 Current Mortgage Loan and Property Stratification Tables 8 - 16 Mortgage Loan Detail 17 - 29 NOI Detail 30 - 42 Principal Prepayment Detail 43 Historical Detail 44 Delinquency Loan Detail 45 - 46 Specially Serviced Loan Detail 47 - 48 Modified Loan Detail 49 Liquidated Loan Detail 50 Bond / Collateral Realized Loss Reconciliation 51 Supplemental Reporting 52 Depositor Credit Suisse First Boston Mortgage Securities Corp. 11 Madison Avenue, 5th Floor New York, NY 10010 Contact: General Information Number Phone Number: (212) 325-2000 Master Servicer KeyCorp Real Estate Capital Markets, Inc. 911 Main Street, Suite 1500 Kansas City, MO 64105 Contact: Marty O'Conner Phone Number: (816) 221-8800 Master & Special Servicer GMAC Commercial Mortgage Corporation 200 Witmer Road Horsham, PA 19044-8015 Contact: Darri Cunningham Phone Number: (215) 328-1784 Master & Special Servicer NCB, FSB 1725 Eye Street, NW Washington, DC 20006 Contact: Kathleen Luzik Phone Number: (202) 336-7633 This report has been compiled from information provided to Wells Fargo Bank, N.A. by various third parties, which may include the Servicer, Master Servicer, Special Servicer and others. Wells Fargo Bank, N.A. has not independently confirmed the accuracy of information received from these third parties and assumes no duty to do so. Wells Fargo Bank, N.A. expressly disclaims any responsibility for the accuracy or completeness of information furnished by third parties. Copyright 2006, Wells Fargo Bank, N.A.

Appraisal Reduction Amount None Cash Reconciliation Detail Total Funds Collected Interest: Scheduled Interest 14,487,933.51 Interest reductions due to Nonrecoverability Determinations 0.00 Interest Adjustments 0.00 Deferred Interest 0.00 Net Prepayment Interest Shortfall 0.00 Net Prepayment Interest Excess 0.00 Extension Interest 0.00 Interest Reserve Withdrawal 0.00 Total Interest Collected 14,487,933.51 Principal: Scheduled Principal 1,395,221.87 Unscheduled Principal 675,000.00 Principal Prepayments 675,000.00 Collection of Principal after Maturity Date 0.00 Recoveries from Liquidation and Insurance Proceeds 0.00 Excess of Prior Principal Amounts paid 0.00 Curtailments 0.00 Negative Amortization 0.00 Principal Adjustments 0.00 Total Principal Collected 2,070,221.87 Other: Prepayment Penalties/Yield Maintenance 52,866.17 Repayment Fees 0.00 Borrower Option Extension Fees 0.00 Equity Payments Received 0.00 Net Swap Counterparty Payments Received 0.00 Total Other Collected: 52,866.17 Total Funds Collected 16,611,021.55 Total Funds Distributed Fees: Master Servicing Fee 119,722.83 Trustee Fee 2,092.79 Certificate Administration Fee 0.00 Insurer Fee 0.00 Miscellaneous Fee 0.00 Total Fees 121,815.62 Additional Trust Fund Expenses: Reimbursement for Interest on Advances 87.75 ASER Amount 0.00 Special Servicing Fee 0.00 Rating Agency Expenses 0.00 Attorney Fees & Expenses 0.00 Bankruptcy Expense 0.00 Taxes Imposed on Trust Fund 0.00 Non-Recoverable Advances 0.00 Other Expenses 0.00 Total Additional Trust Fund Expenses 87.75 Interest Reserve Deposit 0.00 Payments to Certificateholders & Others: Interest Distribution 14,366,030.33 Principal Distribution 2,070,221.88 Prepayment Penalties/Yield Maintenance 52,866.17 Borrower Option Extension Fees 0.00 Equity Payments Paid 0.00 Net Swap Counterparty Payments Paid 0.00 Total Payments to Certificateholders & Others 16,489,118.38 Total Funds Distributed 16,611,021.75

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Specially Serviced Loan Detail - Part 1 No Specially Serviced Loans this Period Specially Serviced Loan Detail - Part 2 No Specially Serviced Loans this Period Modified Loan Detail No Modified Loans Liquidated Loan Detail No Liquidated Loans this Period Bond/Collateral Realized Loss Reconciliation No Realized Losses this Period

Credit Suisse Commercial Mortgage Trust Series 2006-C1 10-D