WASHINGTON, D.C., June 2, 2008 - Cogent Communications Group, Inc. (NASDAQ: CCOI), one of the largest Ethernet Internet service providers in the world, today announced that Dave Schaeffer, chief executive officer, will present at the following investor-relations conferences:

Deutsche Bank's 2008 Media & Telecommunications Conference is being held in at the New York Palace Hotel. Dave Schaeffer will be presenting on Monday, June 9th at 9:50 AM ET.

18th Annual Wachovia Nantucket Equity Conference is being held at the White Elephant on Nantucket Island, MA. Dave Schaeffer will be presenting on Tuesday, June 24th at 10:45 AM ET.

Investors and other interested parties may access live audio webcasts of these presentations by going to the Investor Relations section of Cogent's website (http://www.cogentco.com/us/ir_events.php) to access the links to the live audio webcasts. A replay of each webcast will be available on Cogent's IR website for 30 days following the presentation.

About Cogent Communications

Cogent Communications (NASDAQ: CCOI) is a multinational, Tier 1 facilities-based ISP, operating one of the largest capacity IP networks in the world with lit capacities ranging from 80 to 200 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 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 Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser..

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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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