Attached files
| file | filename |
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| EX-31.2 - EXHIBIT 31.2 - COGENT COMMUNICATIONS HOLDINGS, INC. | a2196368zex-31_2.htm |
| EX-31.1 - EXHIBIT 31.1 - COGENT COMMUNICATIONS HOLDINGS, INC. | a2196368zex-31_1.htm |
| EX-21.1 - EXHIBIT 21.1 - COGENT COMMUNICATIONS HOLDINGS, INC. | a2196368zex-21_1.htm |
| EX-32.2 - EXHIBIT 32.2 - COGENT COMMUNICATIONS HOLDINGS, INC. | a2196368zex-32_2.htm |
| EX-10.25 - EXHIBIT 10.25 - COGENT COMMUNICATIONS HOLDINGS, INC. | a2196368zex-10_25.htm |
| EX-32.1 - EXHIBIT 32.1 - COGENT COMMUNICATIONS HOLDINGS, INC. | a2196368zex-32_1.htm |
| 10-K - 10-K - COGENT COMMUNICATIONS HOLDINGS, INC. | a2196368z10-k.htm |
Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
We consent to the incorporation by reference in the Registration Statements (Form S-8 Nos. 333-126676, and 333-142759, and Form S-3ASR No. 333-144819) of Cogent Communications Group, Inc. of our reports dated March 1, 2010, with respect to the consolidated financial statements of Cogent Communications Group, Inc. and the effectiveness of internal control over financial reporting of Cogent Communications Group, Inc. included in this Annual Report (Form 10-K) for the year ended December 31, 2009.
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/s/ Ernst & Young LLP |
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McLean, VA |
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March 1, 2010 |
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