• AboveNet

• ACC Business

• Accel Networks

• AccuConference

• Advantix

• Airband

• AireSpring

• AT&T

• Birch Telecom

• Broad Sky Networks

• Broadview Networks

• Cavalier

• CBeyond

• CenturyLink

• Charter Communications

• Coast 2 Coast

• Cogent Communications

• Comcast Business Class

• Covad

• EarthLink Business 

• EasyLink

• Ernest

• Etherspeak

• Excel

• First Communications

• Fusion

• Global Crossing

• GSI

• GTT

• Hughes

• InContact

• Innsite

• Integra Telecom

• Intercall

• Internap

• Level 3

• Masergy

• Megapath

• MetTel

• Mosaic Networks

• NetWolve

• One Communications

• Nitel

• Paetec

• PGi

• Powernet Global

• Qwest

• Reallinx

• Savvis

• SmoothStone

• Sprint

• Telecom Recovery

• TelePacific

• Telesphere

• Telnes

• Telx

• Time Warner Cable

• TNCI

• TW Telecom

• USA Digital

• Verizon Business

• Vocal IP Networx

• Windstream

• XO