Cogent Communications Named as One of the Top Wholesale Carriers in Europe

LONDON, UNITED KINGDOM, September 19, 2006 - Cogent Communications, Inc. (NASDAQ: CCOI), one of the largest carriers of Internet traffic in the world, today announced that Cogent has been named a finalist for Best Wholesale Carrier by the World Communications Awards (WCA) committee. The finalists of this prestigious award were selected by the WCA committee that is chaired by Total Telecom magazine and comprised of independent judges from a wide range of industries sharing a common focus on the telecommunications industry. Over 250 entries were received for a variety of categories this year.

"Cogent Communications has made a big impact in the global telecoms business, and that has caught the attention of the WCA judges' panel, which watches the telecoms industry from every corner of the world. Cogent has been short-listed for Best Wholesale Carrier, a category traditionally dominated by incumbents. The judges recognised the new business thinking that Cogent is bringing to the sector," said David Molony, Editor in Chief, Total Telecom.

"We welcome this achievement and believe it helps validate Cogent's unique business model and the unprecedented value Cogent delivers to customers vis-à-vis high quality Internet connectivity and transport services at very competitive prices," said Dave Schaeffer, CEO Cogent Communications. "We continue to make great progress in Europe with additional customers, markets and traffic loaded onto our network, and we are committed to meeting the bandwidth demands of the continent well into the future."

The winner of the Best Wholesale Carrier will be announced at the WCAs on November 9th at a dinner gala held at the London Marriott Hotel, Grosvenor Square, London. Several other categories will also be presented that evening. For a list of judges and other info on the event, go to: (link no longer available).

About Cogent Communications

Cogent Communications (NASDAQ: CCOI) is a multinational, Tier 1 facilities-based ISP ranked by Ovum-RHK as the largest provider of Ethernet services in the United States. 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 spans 14 countries and provides IP services in approximately 90 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. Network ownership also enables Cogent to offer superior customer support through end-to-end control of service delivery and network monitoring.

Cogent Communications is headquartered at 1015 31st Street, NW, Washington, D.C. 20007. For more information, visit 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..

# # #

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.