Cogent Communications to Host Third Quarter 2013 Earnings Call on November 8, 2013

WASHINGTON, D.C. October 11, 2013 – Cogent Communications Group, Inc. (NASDAQ:CCOI, news, filings) will host a conference call with financial analysts at 8:30 a.m. (EST) on November 8, 2013 to discuss Cogent’s operating results for the third quarter of 2013. Cogent will issue a press release announcing the operating results at 7:00 a.m. (EST) on November 8, 2013.

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

Dial-in Numbers: 1-800-668-4132 for U.S. callers or 1-224-357-2196 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 February 28, 2014.

Telephone Replay: Friday, November 8, 2013 at 10:30 a.m. (EST) and continuing through 11:59 p.m. EST on Thursday, November 14, 2013. To listen to the replay, please dial 1-404-537-3406, Access code 76450369

About Cogent Communications

Cogent Communications (NASDAQ: CCOI) is a multinational, Tier 1 facilities-based ISP, consistently ranked as one of the top five Internet backbone networks in the world. Cogent specializes in providing businesses with high speed Internet access, Ethernet transport and colocation services. Cogent’s facilities-based, all-optical IP network provides services in over 180 markets globally.

Since its inception, Cogent has unleashed the benefits of IP technology, building one of the largest and highest capacity IP networks in the world. 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 info@cogentco.com.

# # #

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.

###