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Cogent Communications to List on American Stock Exchange as COI

WASHINGTON, D.C., January 30, 2002 - Cogent Communications Group, Inc., a Tier One, next-generation optical ISP announced today that it has been approved for listing on the American Stock Exchange. The Exchange's Committee on Securities determined, due to a number of factors, including Cogent's compliance with all other applicable guidelines, that Cogent substantially complies with the applicable listing eligibility guidelines and should be approved for listing even though it does not fully meet the $15 million guideline for market value of public float based on the current market value of Allied Riser's public float.

The Exchange's approval remains subject to certain conditions, including the successful completion of Cogent's acquisition of Allied Riser Communications Corporation. Pending approval of the transaction by Allied Riser's stockholders at their special meeting on January 31, Cogent expects to complete its acquisition of Allied Riser later that day, at which time it expects it will meet the Exchange's conditions for listing. Once listed on the American Stock Exchange, Cogent will trade under the symbol COI.

About Cogent Communications

Cogent Communications is a next generation optical ISP focused on delivering ultra-high speed Internet access and transport services to businesses in the multi-tenant marketplace and to service providers located in major metropolitan areas throughout the United States. Cogent's signature service offered to commercial end-users of 100 Mbps for $1,000, offers 100 times the observed bandwidth of a T-1 connection at two-thirds of the cost. The Cogent Solution makes ultra-high speed Internet access an affordable reality for small and medium-sized businesses, as well as large enterprises and service providers. Cogent's facilities-based, all-optical end-to-end IP network enables non-oversubscribed 100 Mbps and 1000 Mbps connectivity for radically low, unmetered pricing levels.

Cogent's network consists of a dedicated nationwide multiple OC-192 fiber backbone, multiple intra-city OC-48 fiber rings, and optically-interfaced high-speed routers. Cogent has been recognized as the first IP Optical Cisco Powered Network (CPN). Cogent is currently servicing 20 metropolitan markets. Cogent Communications is a privately held company headquartered at 1015 31st Street, NW, Washington, D.C. 20007. For more information, visit www.cogentco.com. Cogent Communications can be reached 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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Cogent is one of the world's largest Internet Service Providers, delivering high quality Internet, Ethernet and Colocation services to over 69,400 Enterprise and NetCentric customers. Cogent serves over 199 markets in 41 countries across its facilities-based, all-optical IP network.

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