WASHINGTON, D.C., September 12, 2002 - Cogent Communications Group, Inc. (AMEX: COI), a Tier One, next generation, optical Internet service provider, reported today that is has acquired key assets from FiberCity Networks, a provider of Internet and Optical Ethernet services headquartered in the New York Metropolitan Area. Included in the acquisition are a vast majority of FiberCity's customer base as well as their building access agreements. As part of the acquisition agreement, FiberCity Networks will cease operations.

"Cogent has surgically taken the best assets from FiberCity and will integrate them into Cogent's existing footprint and business plan," said Dave Schaeffer, CEO Cogent. "During this consolidation phase of our industry, Cogent will continue to examine the assets of competitors and companies like FiberCity, looking for acquisitions that accelerate our growth and can bring more Internet traffic onto our backbone."

"We approached Cogent after considerable effort and review. As we have almost completed the transition, we are even more certain that Cogent was the right recommendation for our customers and for our organization," said Jim Burns, CEO FiberCity Networks.

About Cogent Communications

Cogent Communications (AMEX: COI) is a Tier 1, facilities based, all-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 across the United States. Cogent's signature service offered to commercial end-users of 100 Mbps for $1,000 per month, offers 100 times the observed bandwidth of a T-1 connection at approximately 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 acquired the U.S. operations of PSINet and is now servicing 33 metropolitan markets with services ranging from T1 and T3, to 100 Mbps and 1,000 Mbps Internet connectivity and transport services. 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 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..

# # #

This news release contains forward-looking statements that involve risks and uncertainties. Factors that could cause or contribute to such risks and uncertainties include, but are not limited to, successful completion or expansion of the network, our connection to the Internet requires us to obtain and maintain relationships with other providers, our rights to the use of the dark fiber that make up our network may be affected by the financial health of our fiber providers, we often are limited in choices for metropolitan fiber suppliers and we will need to obtain or construct additional building laterals to connect buildings to our network. Additional general factors include competition, changes in technology and methods of marketing, and various other factors beyond the Company's control.

###