WASHINGTON, D.C., September 14, 2005 - Cogent Communications Group, Inc. (AMEX: COI), a Tier 1 Internet Service provider, announced today that Dave Schaeffer will be speaking at the Merriman Curhan Ford & Co. Investor Summit 2005 on September 19, 2005 at 9:00 a.m. PDT. The event will be held at the Mark Hopkins InterContinental Hotel in San Francisco.

Mr. Schaeffer's presentation will be webcast and available to the public by going to: http://www.wsw.com/webcast/mcm2/coi/. There will also be a link under "Events/Presentations" on the Cogent Investor Relations website at http://www.cogentco.com/htdocs/presentations.php.

About Cogent Communications

Cogent Communications (AMEX: COI) is the number one provider of Ethernet services in the United States based on the number of ports in service as ranked by Ovum-RHK and is one of the fastest growing Tier 1 ISPs in the world. Its facilities based, all-optical network delivers ultra-high speed Internet access and transport services to businesses and service providers in major metropolitan areas. Cogent offers services across its 30,600-mile IP network spanning 12 countries located in North America and Europe.

The combination of technology, IP network architecture and unique business model has combined to help make Cogent one of the most popular solutions for reliable, cost-effective Internet service in the industry.

Cogent offers several focused services that complement its On-Net Internet access service including dedicated Off-Net (T1, T3) Internet service, colocation services in 30 data centers across North America and Europe, and Layer 2 Point-to-Point services in every On-Net market.

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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