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AboveNet
ACC Business
Accel Networks
AccuConference
Airband
AireSpring
AT&T (formerly: BellSouth/PacBell/SBC/Ameritech)
BandTel
Broad Sky Networks
Broadweave
Celairo
Ernest Communications
GTT
Global Crossing
Internap
Level 3 (formerly: Broadwing)
NBS
MegaPath (formerly: Netifice/Covad/Speakeasy)
Mosaic Networx
New Edge Networks
NiTel
One Communications
Paetec (formerly: US LEC/McLeodUSA/Cavalier)
PowerNet Global
Qwest
Savvis
Smoothstone
Sprint/Nextel
TelePacific
Telnes Broadband
Telx
Time Warner Cable Business Class
TW Telecom (formerly: Xspedius)
TMC Communications
UCN
USA Digital
Vocal IP Networx
Windstream (formerly: Nuvox)
XO Communications
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