301 Carriers

Ymax Communcations Corp. - Fl Xspedius Management Co. Switch
Winstar Communications Verizon Maryland, Inc. - Md
Verizon Maryland, Inc. Verizon West Virginia, Inc. -
Vdl, Inc. Dba Global Telecom B Uscoc Of Cumberland, Inc. Dba
Us Lec Of Virginia Llc - Dc Teleport Communications Group,
Starpower Communications, Llc Sprint Spectrum L.P. - Md
Sprint Spectrum L.P. Southwestern Bell Mobile Syste
Quantum Telecommunications, In Paetec Communications, Inc. -
Pac-West Telecomm, Inc. - Md Omnipoint Miami E License, Llc
Omnipoint Communications Cap O Nextel Communications, Inc.
New Frontiers Telecommunicatio Metrocall
Mci Worldcom Communications, I Mci Metro Ats, Inc. - Md
Mci Metro Ats, Inc. - Dc Level 3 Communications, Llc -
Kmc Telecom Iii, Inc. - Md Idt America, Corp. - Md
Idt America Geotek Communications, Inc.
Dobson Cellular Systems, Inc. Core Communications, Inc. - Md
Comcast Phone Of Northern Mary Comcast Phone Of Maryland, Inc
Cellco Partnership Dba Verizon Cavalier Telephone Mid-Atlanti
Broadwing Communications, Llc Blue Licenses Holding, Llc
Baltimore-Washington Telephone At&T - Local - Nh
At&T - Local - Md At&T - Local - Dc
Arch Wireless Holdings, Inc.


301 Exchanges

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