Cogent Communications Group, Inc. (NASDAQ-CCOI) will host a conference call at 8:30 a.m. ET on November 7, 2007 to discuss Cogent's operating results for the third quarter of 2007. Cogent will issue a press release announcing the operating results at 7:00 a.m. ET on November 7, 2007. To participate, investors and other interested parties may access the earnings call as follows: Dial-in Number: 1- 800-930-1353 for U.S. callers 1- 913-312-1304 for international callers Internet: An audio webcast is accessible at "Events" at the "Investor Relations" section of Cogent's website at www.cogentco.com. Telephone Replay: Wednesday, November 7, 2007 at 11:30 a.m. ET and continuing through 12 a.m. ET on Friday, November 9. To listen to the replay, please dial 1-719-457-0820, Access code 8514761