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Cogent Communications to Host First Quarter 2008 Earnings Call on May 9, 2008

WASHINGTON, D.C., April 9, 2008 - Cogent Communications Group, Inc. (NASDAQ: CCOI) will host a conference call with financial analysts at 8:30 a.m. (ET) on May 9, 2008 to discuss Cogent's operating results for the first quarter of 2008. Cogent will issue a press release announcing the operating results at 7 a.m. (ET) on May 9, 2008.

To participate, investors and other interested parties may access the earnings call as follows:

Dial-in Numbers: 1-877-548-7912 for U.S. callers or 1-719-325-4901 for international callers

Internet: An audio webcast is accessible under "Events" at the "Investor Relations" section of Cogent's website at www.cogentco.com and will remain available through July 31, 2008.

Telephone Replay: Friday, May 9, 2008 at 11:30 a.m. ET and continuing through 11:59 p.m. ET on Friday, May 16.

To listen to the replay, please dial 1-719-457-0820, Access code 9861134

About Cogent Communications

Cogent Communications (NASDAQ: CCOI) is a multinational, Tier 1 facilities-based ISP, operating one of the largest capacity IP networks in existence with lit capacities ranging from 80 to 180 Gigabits per second. Cogent specializes in providing businesses with high speed Internet access and point-to-point transport services. Cogent's facilities-based, all-optical IP network backbone provides IP services in over 100 markets located in North America and Europe.

Since Cogent's inception, Cogent has unleashed the benefits of IP technology, building one of the largest and highest capacity IP networks in existence. This network enables Cogent to offer large bandwidth connections at highly competitive prices. Cogent also offers superior customer support by virtue of its end-to-end control of service delivery and network monitoring.

Cogent Communications is headquartered at 1015 31st Street, NW, Washington, D.C. 20007. For more information, visit www.cogentco.com. Cogent Communications can be reached in the United States at (202) 295-4200 or via email at This email address is being protected from spambots. You need JavaScript enabled to view it..

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Information in this release may involve expectations, beliefs, plans, intentions or strategies regarding the future. These forward-looking statements involve risks and uncertainties. All forward-looking statements included in this release are based upon information available to Cogent Communications Group, Inc. as of the date of the release, and we assume no obligation to update any such forward-looking statement. The statements in this release are not guarantees of future performance and actual results could differ materially from our current expectations. Numerous factors could cause or contribute to such differences. Some of the factors and risks associated with our business are discussed in Cogent's registration statements filed with the Securities and Exchange Commission and in its other reports filed from time to time with the SEC.

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Cogent Communications

Cogent is one of the world's largest Internet Service Providers, delivering high quality Internet, Ethernet and Colocation services to over 64,240 Enterprise and NetCentric customers. Cogent serves over 198 markets in 41 countries across its facilities-based, all-optical IP network.

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