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Cogent Extends Network Connectivity in London

London, February 7, 2005 - Cogent Communications Group, Inc. (AMEX: COI), one of the fastest growing multinational Tier 1 Internet service providers, today announced that it has established a presence in one of Redbus Interhouse (UK) Limited's London colocation facilities. Redbus Interhouse is one of Europe's most advanced, independent colocation and data centre service providers.

Maximizing Cogent's reach to service-provider customers in London is extremely important to Cogent's international expansion plans. By building a presence in Redbus Interhouse's data centre, Cogent can reach new customers through quick and cost effective cross connects. This additional London presence affords Cogent the opportunity to expand sales of its extensive portfolio of highly reliable, competitively priced Tier 1 products and services, including Internet transit services and IP (Internet Protocol) Transport products such as VPNs (Virtual Private Networks).

"Cogent has rapidly entered the European market and is generating a significant amount of interest in the market by offering reliable bandwidth at highly competitive price points," said Simon Neal, UK Country Manager, Redbus Interhouse (UK) Ltd. "We wish Cogent well in their drive to become one of the top providers of Internet access in Europe and look forward to forging a long-term relationship in our state-of-the-art facilities."

Cogent's network spans 49,000 kilometers in over 85 markets in 11 countries throughout Europe and North America. Cogent continues to focus on adding customers and revenue to the network, to make it even more competitive and efficient.

"Historically, Cogent has gained good acceptance in colocation facilities, signing up to 50% of customers at third party facilities. Looking at the high quality of Redbus Interhouse's customers and the value that Redbus Interhouse delivers, this has all the makings of a very successful relationship for Cogent," said Dave Schaeffer, CEO of Cogent Communications.

Cogent sought a location with a state-of-the-art data centre and a proven reputation with other carriers. Cogent selected Redbus Interhouse's colocation facility based on their reputation for reliability and their technical expertise.

Cogent has quickly established a significant presence throughout Europe through the completion of several critical acquisitions, including LambdaNet France and Spain and Global Access in Germany. Cogent has also generated organic growth through sales by offering its high quality Internet and data services at prices that Cogent believes are among the lowest offered in Europe.

About Cogent Communications

Cogent Communications (AMEX: COI) is a next generation, multinational, Tier 1 ISP. Its facilities based, all-optical network delivers ultra-high speed Internet access and transport services to business and service providers in major metropolitan areas across North America and Europe. Since opening its doors in 1999, Cogent's elusive combination of high quality, reliable, low cost bandwidth and superior customer support have enabled Cogent to become one of the fastest growing ISPs in the industry. Cogent was recently ranked as the fastest growing company in 2004 in the Washington, DC area by the Washington Business journal.

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 1 (202) 295-4200 or via email at This email address is being protected from spambots. You need JavaScript enabled to view it..

About Redbus Interhouse

Redbus Interhouse (www.interhouse.net) is Europe's most advanced independent colocation company. For business-critical online, data or telecom applications, Redbus Interhouse offers versatile, cost-effective and secure housing facilities backed-up by state-of-the-art infrastructure and 24/7 engineering and facilities support. Redbus Interhouse offers business resilience services within its own independent colocation facilities in Europe's key business centres allowing its customers to rapidly access markets across Europe without losing focus on their core businesses. The enterprise has data centres in London, Paris, Milan, Frankfurt and Amsterdam. Its independence gives customer's freedom of choice from a wide range of telecommunication providers, Internet Service Providers and Content Providers. Its continued sales success combined with a strong balance sheet, means that Redbus Interhouse enjoys a leading position in this marketplace. In June 04, Redbus Interhouse plc demonstrated its high level of competence in information security management by having the first collocation independent data centre in Europe to be awarded with the BS7799 accreditation, the ultimate benchmark for information security.

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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 filings with the SEC.

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