| ACC Business | ICG Communication | New Edge | TelePacific |
| AT&T | ITC Deltacom | Paetec | US LEC |
| Cbeyond | MCI | Qwest | XO Communications |
| Covad | Megapath | Savvis | Xspedius |
| DSL.net | Netifice | Sprint | Communications |
MCI
MCI delivers a comprehensive portfolio of local-to-global business data, Internet and voice services to a 'Who's Who' list of the Fortune 1000. MCI is an established leader in IP network technology and Virtual Private Networking (VPN), delivering VPNs based
on private data networks as well as their global Internet backbone, which spans six continents. Their portfolio includes SONET private line, frame relay, ATM and a full range of dedicated, dial and value-added Internet services.
MCI today owns and operates some of the world's most complex and sophisticated custom networks, delivering value for a wide variety of customers and more than 75 U.S. federal government agencies. They also are a premier provider of audio, video, and Net conferencing services that enable customers to meet and collaborate remotely to effectively conduct business anywhere, anytime.
