- ACC Business
- Airespring
- AT&T (SBC, Bell South)
- Broadsmart
- Business Only Broadband
- Conference Group
- Delta Com
- Eschelon
- Global Crossing
- InterCall
- MetTel
| - Netwolves
- New Edge Networks
- OPEX
- Savvis
- Smoothstone
- Sprint
- TNCI
- US Signal
- USA Digital
- Verizon Business (MCI)
- Xspedius/(Time Warner)
|
