412 Carriers

Ymax Communications Corp. - Pa Xo Pennsylvania, Inc.
Verizon Pennsylvania, Inc. Verizon Pennsylvania
Verizon Pennsylvania, Inc - P Us Lec Of Pennsylvania, Inc.
Telcove Of Pennsylvania, Inc. Tcg Pittsburgh, Inc.
Sprint Spectrum L.P. Schuylkill Mobile Fone, Inc.
Remi Retail Communications, Ll Penn Telecom, Inc.
Paetec Communications, Inc. - Pac-West Telecomm, Inc. - Pa
Nextel Communications, Inc. Metrocall
Mci Metro, Ats, Inc. Mci Metro Ats, Inc. - Pa
Level 3 Communications, Llc - Leap Wireless Intl, Inc. Dba C
Kmc Telecom V, Inc. - Pa Intermedia Communications, Inc
Global Naps - Pa Global Crossing Local Services
Full Service Computing Corpora Commpartners, Llc - Pa
Comcast Phone Of Pennsylvania, Citynet Pennsylvania, Llc - Pa
Choice One Communications, Inc Choice One Communications
Cellco Partnership Dba Verizon Cavalier Telephone Mid Atlanti
Blue Licenses Holding, Llc Bentleyville Communications Co
Bandwidth Com Clec At&T - Local - Pa
Armstrong Tel Co - Pa Arch Wireless Holdings, Inc.
American Messaging (Am), Inc. Allegiance Telecom Of Pennsylv
Aerial Communications Advanced Telephone Sys Inc Dba

412 Exchanges