240 Carriers

Xspedius Management Co. Switch Xo Maryland, Llc
Verizon Maryland, Inc. - Md Verizon Maryland, Inc.
Verizon Maryland Uscoc Of Cumberland, Inc. Dba
Us Lec Of Virginia Llc - Dc Us Lec Of Maryland, Inc.
Tidalwave Telephone Inc. Teleport Communications Group
Starpower Communications, Llc Sprint Spectrum L.P. - Md
Sprint Spectrum L.P. Sprint Spectrum L P
Southwestern Bell Mobile Syste Sbc Telecom, Inc. - Md
Paetec Communications, Inc. - Pac-West Telecomm, Inc. - Md
Omnipoint Communications Cap O Nextel Communications, Inc.
Mte, Inc. Dba Mte Paging Netwo Metrocall
Mci Worldcom Communications, I Lightwave Communications, Llc
Level 3 Communications, Llc - Kmc Telecom Iii, Inc. - Md
Global Naps South, Inc. - Md Global Crossing Local Services
Dslnet Communications Va, Inc. Dobson Cellular Systems, Inc.
Core Communications, Inc. - Md Comcast Phone Of Northern Mary
Comcast Business Communication Cellco Partnership Dba Verizon
Cavalier Telephone Mid-Atlanti Cavalier East Llc - Md
Broadwing Communications, Llc Blue Licenses Holding, Llc
Bandwidth Com Clec Baltimore-Washington Telephone
Atx Telecommunications Service At&T - Local - Md
Arch Wireless Holdings, Inc. Arbros Communications Licensin
Allegiance Telecom Of Maryland


240 Cities

WilliamsportWashington
WaldorfUpper Marlboro
ThurmontTemple Hills
Tall TimbersSmithsburg
Silver SpringRockville
RidgePoolesville
PikesvilleOxon Hill
OdentonOakland
NewburgNanjemoy
MyersvilleMount Rainier
Mount AiryMiddletown
MechanicsvilleMccoole
Lexington ParkLeonardtown
LaurelLa Plata
KensingtonIndian Head
IjamsvilleHyattsville
HughesvilleHighfield
HancockHagerstown
GreenbeltGrantsville
Glenn DaleGaithersburg
FrostburgFrederick
EmmitsburgDamascus
CumberlandCollege Park
ClintonChevy Chase
Capitol HeightsBrandywine
BethesdaBeltsville
BaltimoreAshton
Annapolis JunctionAdamstown


240 Exchanges

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