The document provides information about Cogent Communications, a global internet service provider. It details that Cogent has over 15,000 customers worldwide, operates fiber networks in over 100 metro areas and 26 countries, and carries approximately 15% of the world's internet traffic daily. The document also summarizes Cogent's competitive advantages as being the lowest cost provider with a reliable, high quality network.

1. Unleash the Potential of the Internet… April 2008

2. Who is Cogent? Cogent is a Top 5 Global Internet Service Provider Founded in 1999; publicly traded company (NASDAQ: CCOI). Headquartered in Washington, DC. Serves over 100 major metro markets in North America and Europe. Provides Internet access, Ethernet transport and colocation services. 15,000+ NetCentric (bandwidth-intensive users) and Corporate customers worldwide. Independent third parties rank Cogent as one of the leading ISPs in the world: Provides High Quality Service and wins business based on PRICE 2 nd largest ISP by AS connectivity ( CAIDA) 56 th Fastest Growing Company in North America (Deloitte’s Technology 2006 Fast 500) Carries ~15 % of the World’s Internet Traffic (10+Petabytes per day) Cogent Communications Proprietary and Confidential

3. Network Map Interconnected with 2,300+ different networks 1,215+ On-Net buildings 75% multi-tenant office buildings 25% carrier neutral data centers Agreements with 250+ building owners (REITs) 26,500+ intercity fiber route miles 260+ metro networks; 10,500+ metro fiber miles 34 data centers with 290,000+ sq. ft. of space Longhaul Capacity ranges from 80-180 Gbps Transatlantic Capacity over 140 Gbps across multiple cables/routes Cogent Communications Proprietary and Confidential

4. Corporate Customers Corporate Accenture Blue Cross Boeing Corp BP Energy Co Business Wire Canon C-SPAN CB Richard Ellis CBS Docs. w/o Borders Edelman Pub. Rel. Estee Lauder Exxon Mobil GA Pacific Corp Hearst Magazines IBM Canada KPMG MarthaStewart McKinsey & Co Mitsubishi Int NASCAR Neiman Marcus Nordstrom Northrop Grumman Radio Free Europe SAP Toshiba America Xerox Ziff Davis Media ‘ 05 ’ 04 ’ 03 ’ 01 ’ 04 ’ 03 ’ 02 ’ 02 ‘ 07 ‘ 05 ’ 02 ‘ 05 ’ 02 ’ 03 ’ 01 ’ 04 ‘ 07 ‘ 06 ’ 03 ’ 04 ‘ 07 ‘ 06 ’ 03 ’ 03 ‘ 03 ‘ 04 ’ 04 ’04 ‘ 06 Customer Since Financial ABN Amro Adams Harness & Hill American Express Bain & Company Bank of America BNP Bear Stearns Boston Stock Exch Chicago Brd of Trade Chicago Merc Exch Chicago Stock Exch Deloitte & Touche LLP Depository Trust Essex Investment Equifax General Elec. Finance GMAC Comm. Mort. Hicks Muse Jefferies & Company KKR Lehman Brothers Merrill Lynch NYSE Prudential Securities Putnam Lovell NBF Thoma Cressey Equity UBS US Dept of Treasury Wells Fargo Century ‘ 01 ’ 03 ’ 03 ’ 04 ’ 01 ‘ 05 ’ 02 ’ 03 ‘ 06 ‘ 05 ’ 02 ’ 02 ’ 02 ‘ 05 ’ 03 ‘ 07 ’ 02 ’ 02 ’ 02 ‘ 04 ‘ 06 ’ 03 ‘ 05 ’ 02 ’ 03 ’ 04 ’ 04 ’ 05 ‘ 05 Customer Since Law Firms Alston & Bird Arnold & Porter Arent Fox Kintner Baker & McKenzie Baker Botts Bingham McCutchen Cravath Davis Polk Debevoise/Plimpton Dewey Ballantine Foley & Lardner Fried Frank Greenberg Traurig Heller Ehrman Holland & Knight King & Spalding Kirkland & Ellis Latham & Watkins Morrison & Forester Pillsbury Winthrop Ropes & Gray Schiff Hardin Sidley Austin Simpson Thacher Steptoe & Johnson Sullivan & Cromwell Swidler Berlin Weil Gotshal White & Case ‘ 04 ’ 04 ’ 02 ’ 02 ’ 02 ‘ 05 ‘ 04 ‘ 04 ‘ 06 ’ 03 ‘ 05 ’ 03 ‘ 06 ’ 03 ’ 03 ‘ 03 ’ 02 ‘ 01 ’ 04 ’ 01 ‘ 05 ‘ 05 ‘ 06 ‘ 02 ’ 03 ‘ 07 ’ 01 ’ 04 ’ 02 Customer Since Leading provider to professional services firms Law firms Financial services Consulting services Corporations Cogent Communications Proprietary and Confidential 9,200+ Customer Connections

5. Application Businesses Apple Computer ‘04 BrightCove ’06 CareerBuilder.com ‘07 Comcast ‘07 E! Entertainment ‘06 Ebay / Shopping.com ‘06 Gannett ‘06 Google ’03 IKON Solutions ‘06 Media Defender ‘03 Newsfeeds.com ‘05 NFL ‘02 Ofoto ‘05 Pando ‘06 PhotoBucket ‘05 Rapidtec.de ‘06 Schlund & Partners ‘06 ShutterFly ‘05 Skype ‘06 SlingMedia ‘06 Socially Blog ‘06 TagWorld ‘06 Unipoint ‘02 Viacom ‘06 Voex ‘06 Yahoo ‘06 YouSendIt.com ‘04 YouTube ‘06 NetCentric Customers Universities American Univ. Boston Univ. Carnegie Mellon Cornell University DePaul University Drexel Duquesne Univ. George Wash. Georgetown Univ. Georgia Tech Harvard Univ. Hofstra Univ. MIT Pace Univ. Queen’s Univ. Ryerson Univ. Suffolk Univ. Stanford Univ. Tufts University UC-Berkeley Univ. of Chicago Univ. of Delaware Univ. of Illinois University of Iowa Univ. of Penn Univ. of S. Florida Univ. of Texas Univ. of Toronto Villanova ‘ 03 ‘ 07 ’ 01 ’ 02 ’ 04 ‘ 06 ‘ 05 ’ 03 ’ 02 ’ 03 ’ 02 ‘ 07 ’ 03 ‘ 04 ’ 02 ’ 04 ’ 03 ’ 02 ’ 01 ’ 04 ‘ 02 ’ 04 ’ 05 ’ 04 ’ 02 ’ 04 ‘ 07 ’ 03 ‘ 05 Customer Since Service Providers AboveNet Bell Canada BT Americas Colt Telecom Datagram Edge Telecom UK FiberNet Telecom Foliofn Internet Radio Deltacom Gold Telecom Hughes Ntwk Sys JazzTel Jolt Keynote Systems Linx Telecom Looking Glass Ntwks Netvision Telecom RU Numéricable Novis ONO Orange Primus Radio Free Virgin T-Online Spain Telkom South Africa Telefonica Tsystems Wanadoo/France Tel ‘ 04 ’ 04 ’ 04 ‘ 05 ’ 04 ‘ 07 ’ 05 ‘ 03 ‘ 04 ’ 02 ‘ 07 ‘ 04 ‘ 05 ’ 04 ’ 03 ‘ 06 ’ 03 ‘ 07 ’ 02 ‘ 05 ’ 02 ‘ 06 ’ 03 ’ 03 ‘ 07 ’ 04 ’ 05 ’ 06 ’ 06 Customer Since Customer Since Leading provider to bandwidth-intensive organizations ISPs Universities Online gamers ASPs Cogent Communications Proprietary and Confidential 5,700+ Customer Connections

6. European Union - NetCentric “ One of the best price / performance ratios in the market.” “ Good service, fast provisioning …” Customer Comments Are Overwhelmingly Positive Fall 2006 NPS Survey North America - NetCentric “ Reliable connection, reasonable pricing, extensive network, good support.“ “ You’re not going to find a better price anywhere else! It’s true!” “ Cogent is a very professional team. Everything they promised before our signing the contract was delivered on time and hassle free.” North America - Corporate Off-Net “… overall start up process went very smoothly … well informed on each step.” “ ... you keep your clients informed about changes and system maintenance dates ….” “… proactive - they know I'm down … sometimes before I know I'm down …” North America - Corporate On-Net “… price/performance is absolutely mind blowing ... easy sell to upper management …” "... the service is near perfect, lightning fast speed, unparalleled reliability, superior customer service …” "... speed on installs ..." Cogent Communications Proprietary and Confidential

7. Market Share Cogent has 15% share of the world’s Internet traffic and grows 2X faster than the market Avg Gbps Avg Gbps Cogent Communications Proprietary and Confidential CAGR = 150% CAGR = 76% 2003 2004 2005 2006 2007 7% 7% 13% 15% TBD CCOI Share 1 * Data provided by Dr. Andrew M. Odlyzko, Director, Digital Technology Center, University of Minnesota. 2 Telegeography's 2007 Global Internet Geography Report. World’s Internet Traffic 2 Cogent Network Traffic

8. Why Customers Choose Cogent Cogent competes primarily with incumbents (ILECs) and resellers offering T1 or T3 connectivity AT&T Verizon / MCI Cogent competes primarily with other backbone suppliers Level 3 Global Crossing Verizon / MCI FT (in FR) DTAG (in DE) BT (in UK) Telefonica (in ES) Sprint Qwest Cogent Communications Proprietary and Confidential NetCentric Market (Internet Core Backbone) Speed and quality of connection is equivalent Cogent’s price is 30% of market average Price per connection is relatively equivalent Cogent’s quality of connection is substantially superior Cogent offers 65 : 1 throughput advantage (versus a T1) Cogent offers true network independence from telco facilities Corporate Market (Local Distribution) Pricing Dynamics

9. Cogent’s Competitive Advantage Cogent is the Lowest Priced Provider Low cost, efficient network with low utilization of installed capacity $14 billion of invested capital from 13 acquisitions ($4 billion of PP&E) purchased for $60 million More reliable and less costly than IP networks overlaid on traditional telephone networks IP only product set Simple product set with low cost of operations and provisioning Cogent Passes Cost Savings onto the Customer Cogent Communications Proprietary and Confidential

10. Our Products – Dedicated Internet Access Applications Netcentric Customers (ISPs / Content Providers) Deliver high performance to end-users, guaranteed Low ping times and high transfer rates for all types of Internet usage from fractional FastE to multiple GigE configurations Corporate Customers High-speed fully dedicated quality Internet access Take connections either in Data Centers as a complement to your world-wide WAN solution or directly at your office premises Delivery On-Net 34 Cogent Data Centers > 300 Carrier Neutral Data Centers > 915 Corporate Buildings Off-Net Delivery at Customer Premises Features / Technical Characteristics Single world-wide Tier-1 AS 174 BGP or Static Routing Configuration Interfaces Ethernet: FastE or GigE PDH/SDH/SONET : E1/T1, E3/DS3, STM-N/OC-X Flat or usage-based billing options Options Primary / Secondary DNS Black Hole Server Back-Up Mail Server Full SLA Global Network availability: 100% Packet loss: < 0.1% Latency < 45 ms intra-North America < 85 ms transatlantic < 35 ms intra-Europe Proactive outage notification within 15 minutes Rapid Installation On-Net: 17 days or less Off-Net: Depending on Local Tail provider Customer Support Available 24x7x365 Global Customer-Focused NOC in Washington, DC Local NOCs in Paris, Madrid, Frankfurt Dedicated Internet Access IP Transit

11. Our Products – Ethernet Point-to-Point Applications Netcentric Customers (ISPs / Content Providers) Interconnect distant network locations Remote access to public peering points Guaranteed high-speed throughput Corporate Customers Private and secure full speed LAN-to-LAN extension Enabler for bandwidth intensive distributed applications, Remote storage or Disaster Recovery Available Topologies Point-to-Point, Meshed Network Delivery On-Net Delivery in most of Cogent’s 1,215+ On-Net buildings 34 Cogent Data Centers > 300 Carrier Neutral Data Centers > 915 Corporate Buildings Off-Net Delivery at Customer Premises Features / Technical Characteristics Ethernet over WDM Reach and Port Based Billing National International Transatlantic Per port (rather than per link) bandwidth assignment VLAN-based Connectivity Flexible assignment of VLAN between ports VLAN tagging acc. to IEEE 802.1q MTU size 1,500 bytes (Q-in-Q available in many locations) Interfaces Ethernet: FastE or GigE Full SLA Global Network availability: 100% Rapid Installation On-Net: 17 days or less Off-Net: Depending on Local Tail provider Customer Support Available 24x7x365 Global Customer-Focused NOC in Washington, DC Local NOCs in Paris, Madrid, Frankfurt Ethernet Point-to-Point

12. Our Products – Colocation Colocation Over 282,000 ft² Applications Netcentric Customers (ISPs / Content Providers) Host telecommunications equipment (DC / AC powered) & IT devices (servers, mainframes) in a secure and state-of-the-art data center environment, right in the heart of the Internet Corporate Customers House your primary mission-critical IT environment (servers, mainframes, storage devices) or your disaster recovery environment in a highly secure and perfectly connected data center environment Delivery In one of Cogent’s 34 Data Centers Features/Technical Characteristics Configurations Stand-Alone Footprint / Rack or Cage / Suite Bundle with Internet or Ethernet connectivity Fully Redundant Power Supply AC (110 / 230V) or DC (48V) Redundant UPS Battery Back-Up On-Site Diesel Generators Fire Detection and Suppression Systems Above and below floor smoke heads Central monitoring Inert gas tanks (FM 200) Air Conditioning Temperature and Humidity Control Access Control Intercom and Biometric Keycard systems Helping Hands Option (select locations) Rapid Installation Customer Support Available 24x7x365 Global Customer-Focused NOC in Washington, DC Local NOCs in Paris, Madrid, Frankfurt North America Atlanta, GA (2 locations) Boca Raton, FL Chicago, IL (2 locations) Columbus, OH Dallas, TX Detroit (Troy), MI Herndon, VA Los Angeles (Downtown) Los Angeles (Marina del Rey) , CA Miami, FL Europe France Paris (2 locations) Lille Nantes Toulouse Grenoble Nice Nice / Sophia-Antipolis Montpellier Strasbourg Bordeaux Rouen Rennes Tours Poitiers Dijon Germany Frankfurt Vienna, VA New York, NY Milwaukee, WI Pittsburgh, PA Washington, DC

13. End-to-End Service Connects directly into your office location Each building or data center receives 2 to 80 Gb of dedicated capacity. You receive an RJ-45 or fiber hand off, creating a “plug and play” installation. Cogent guarantees 17 day installation for On-Net services Cogent’s Network Connects directly to the Server in Your Office Customer Connections Distribution Riser Innerduct OC-48 Metro Ring Delivering an average of 5 Gbps of Dedicated Capacity to Each Building Cabinet Containing Fiber Connection, Router, DC Power, and Battery Back-Up 20 AMP/110 V Dedicated Outlet Cogent Communications Proprietary and Confidential

14. Virtually Unlimited Capacity Dedicated, Non-Oversubscribed Internet Connections Means No QoS is Needed Large capacity network generates ample bandwidth Ample capacity eliminates QoS issues like dropped packets and latency Today, Cogent carries over 10+ Petabytes per day of pure Internet traffic on its network. That is equivalent to a person watching back-to-back movies on the Internet for 1,600+ years continuously. Cogent Communications Proprietary and Confidential

15. ‘ Self Healing’ Ring Architecture Cogent’s award-winning ring design provides physical diversity at the metro and backbone levels. In the event of a fiber cut anywhere on the ring, the routers redirect your traffic around the ring away from the cut, restoring your connectivity from the other direction and ensuring your data is not lost. Ring Architecture Guarantees Connectivity Despite a Fiber Cut Despite fiber cut, your connection remains intact! Cogent Hub Building Cogent Backbone IP over DWDM Metro Ring Multi-Tenant Office Buildings Cogent Backbone What The Ring Looks Like How The Ring Works Dedicated bandwidth is devoted to each building Cogent Communications Proprietary and Confidential

16. Service Level Agreement (SLA) GLOBAL NETWORK AVAILABILITY: 100.0% PACKET SUCCESSS RATE: >99.9% LATENCY: INTRA-NORTH AMERICA <45 ms INTRA-EUROPE <35 ms TRANSATLANTIC <85 ms SERVICE DELIVERY: 17 DAYS Cogent’s SLA is one of the best in the industry. The company maintains 24x7 customer support, with Customer-Focused NOCs in Washington, Paris, Frankfurt and Madrid. We proactively notify our Layer 3 customers within 15 minutes of an outage on their circuit. Cogent Communications Proprietary and Confidential

17. Peering Cogent’s network directly interconnects with 2,300+ networks, including virtually all major content and access networks in the world. These connections are mostly private and constantly maintained and upgraded to adequate capacity levels. 24 50 2.8+ Tbps 4800+ Public Peering Points Private Peering Points Peering Capacity Peering Sessions Cogent has the 2nd Largest Peering Program in the World CCOI Cogent Communications Proprietary and Confidential

18. Cogent Data Centers Cogent owns 34 state-of-the-art data centers where affordable pricing and secure facilities provide you with a great alternative to hosting your own equipment. Cogent also connects to an additional 300+ carrier-neutral colos, providing excellent opportunities for data storage, disaster recovery, data backup and redundancy. Cogent Provides Excellent Data Center Facilities Diesel/Gas Generator Back-Up Raised Flooring to Keep Cabinets Cool and Provide Easy Access to Cables Access Control System to Control & Monitor Entry & Exits Fire Alarm & Suppression System Cogent Communications Proprietary and Confidential

19. Highlights Leading global Internet service provider Peers / Traffic / Price Independent, low-cost international network Network footprint targeted at high traffic locations Very strong balance sheet Experienced management team Substantial network capacity Cogent Communications Proprietary and Confidential

20. Why Buy from Cogent? Cogent’s Low Prices save you money. Cogent’s Big Bandwidth allows you to work faster, better, and smarter. Entrust your Internet to Cogent’s IP Specialists , not telecom general practitioners. Changing to Cogent is Low Risk and Easy : Top 5, Tier 1 Provider that carries 15% of the world’s Internet traffic. High quality Network and Customer Support, backed by SLAs with credits. Service Delivery is fast and friendly. 15,000+ Cogent Customers are overwhelmingly fans of our Service. Cogent Communications Proprietary and Confidential