410 Carriers

Xspedius Management Co. Switch Xo Maryland, Llc
Winstar Communications, Llc - Weblink Wireless, Inc.
Weblink Wireless Verizon Maryland, Inc. - Md
Verizon Maryland, Inc. Us Lec Of Maryland, Inc.
Teleport Communications Group Sprint Spectrum L.P.
Sprint Communications Company, Southwestern Bell Mobile Syste
Redi-Call Communications Co Paetec Communications, Inc. -
Pac-West Telecomm, Inc. - Md Omnipoint Communications Cap O
Nextel Communications, Inc. Metrocall
Mci Worldcom Communications, I Mci Metro Ats, Inc. - Md
Level 3 Communications, Llc - Idt America, Corp. - Md
Geotek Communications, Inc. Comcast Phone Of Northern Mary
Cellco Partnership Dba Verizon Cavalier Telephone, Llc (Mid-A
Cavalier Telephone Mid-Atlanti Broadwing Communications, Llc
Blue Licenses Holding, Llc Baltimore-Washington Telephone
Atx Telecommunications Service Armstrong Tel Co Of Maryland
Arch Wireless Holdings, Inc. Aquis Communications, Inc.

410 Exchanges