630 Carriers

Ymax Communications Corp Il Xo Illinois, Inc.
United States Cellular Corp. Teleport Communications Chicag
Tds Metrocom, Inc. - Il T-Mobile Usa, Inc.
Sprint Spectrum L.P. Sprint Spectrum L P
Sprint Communications Company, Southwestern Bell Mobile Syste
Sbc Internet Services, Inc. Rcn Telecom Services Of Illino
Paetec Communications, Inc. - Pac-West Telecomm, Inc. - Il
Ovation Communications Of Illi Nextel Communications, Inc.
New Cingular Wireless Pcs Mpower Communications Corp - I
Metrocall Mci Worldcom Communications, I
Mci Metro Ats, Inc. - Il Level 3 Communications, Llc -
Illinois Bell Tel Co - Il Illinois Bell Tel Co
Heartland Communications, Inc. Globalcom, Inc.-Il
Globalcom Global Crossing Local Services
Comcast Phone Of Illinois, Llc Cellco Partnership Dba Verizon
Broadwing Communications, Llc Blue Licenses Holding, Llc
Beepermart, Inc. At&T - Local - Il
Arch Wireless Holdings, Inc. American Messaging (Am), Inc.
Allegiance Telecom Of Illinois Adbeep, Llc

630 Exchanges