WASHINGTON, D.C. May 14, 2013 – Cogent Communications Group, Inc. (NASDAQ: CCOI), one of the largest Internet service providers in the world, today announced that Dave Schaeffer, Cogent's chief executive officer, will present at the following conferences:

The B. Riley 14th Annual Investor Conference is being held at the Loews Santa Monica Beach Hotel in Santa Monica, CA. Dave Schaeffer will be presenting on Monday, May 20th at 1:00 p.m. PDT.

The Stifel Internet, Media and Communications Conference is being held at The Pierre Hotel in New York, NY. Dave Schaeffer will be presenting on Tuesday, May 21st at 2:40 p.m. EDT.

The Barclays Technology, Media and Telecommunications Conference is being held at the Crowne Plaza Times Square in New York, NY. Dave Schaeffer will be presenting on Thursday, May 23rd at 4:40 p.m. EDT.

Investors and other interested parties may access a live audio webcast of the conference presentations by going to the "Events" section of Cogent's website at www.cogentco.com/events. A replay of the Stifel webcast will be available on Cogent's website for 30 days following the presentation and replays of the B. Riley and Barclays webcasts will be available for 90 days following the presentations.

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, point-to-point transport and colocation services. Cogent's facilities-based, all-optical IP network backbone provides IP 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 Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo..

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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 registration statements filed with the Securities and Exchange Commission and in its other reports filed from time to time with the SEC.

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