WASHINGTON, D.C. July 12, 2011 – Cogent Communications Group, Inc. (NASDAQ: CCOI) will host a conference call with financial analysts at 8:30 a.m. (ET) on August 4, 2011 to discuss Cogent's operating results for the second quarter of 2011. Cogent will issue a press release announcing the operating results at 7 a.m. (ET) on August 4, 2011.

To participate, investors and other interested parties may access the earnings call as follows:

Dial-in Numbers: 1-888-271-8586 for U.S. callers or 1-913-312-1463 for international callers

Internet: An audio webcast is accessible under "Events" in the "News" section of Cogent's website at www.cogentco.com and will remain available through October 31, 2011.

Telephone Replay: Thursday, August 4, 2011 at 11:30 a.m. ET and continuing through 11:59 p.m. ET on Tuesday, August 9.

To listen to the replay, please dial 1-719-457-0820, Access code 9823647

About Cogent Communications

Cogent Communications (NASDAQ: CCOI) is a multinational, Tier 1 facilities-based ISP, consistently ranked as one of the top five networks in the world. 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 provides IP services in over 165 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. Cogent also offers superior customer support by virtue of its 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 www.cogentco.com. Cogent Communications can be reached in the United States at (202) 295-4200 or via email at Email住址會使用灌水程式保護機制。你需要啟動Javascript才能觀看它.

# # #

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.

###