3rd alternative
Abovenet
Alliance Communication
ALS
American Alpha
Andrew Telecom
Arbinet
AsiaTelecom, Inc
AT&T
AT&T Local
Atar Twin Media, Inc
ATT/Network Services
Band-X
Bell Nexxia/Bell Canada
BellSouth Carrier Professional Services
Blue Rock
Broadwing Communications LLC
BT Global Services
Cablevision/Lightpath
Call Center Technology
Cogent Communications, inc
Colo Central
Colocation Partners
Communication Technologies, Inc.
Con Edsion Communications
Constellation Networks Corporation
Convergia
Covista
Crosslink, LLC
CyberStar
DCS/Lorcom
Deutsche Telecom
DigitGlobal
DirecTV
Discovery Telecommunications, Inc.
Dollar Phone
DoubleClick
Dreamxotic
Equant
Equinix
Farista Systems, LLC
FiberNet
FiberNet Equal Access
Flag Telecommunications LTD
Florida Satellite Communications Corp
FMC Telecom
FoneSys
Forval International Telecom, Inc.
Freeport Electric
Frontline Communications International
FUTURE NETWORKS MANAGEMENT,INC.
Galaxy Communications Corp.
GATES COMMUNICATIONS
GDS Com Inc
General Telecom/ NGT
Genesis
Genicon Technologies International
Gigabeam
Global Communications Consulting Corp
Global Crossing Telecommunications Inc.
Global Focus
Global NAPs
Global Phone International,LTD
Global Voicecom, Inc.
Globecomm
Globeline Inc.
GlobeSpan Telecommunications
Globetel Communications Corp.
GT Group Telecom Services Corp.
Heritage Communications
HT Systems
IDT Solutions
IMPSAT USA, INC
Innovative Communication Technologies
International Controllers Inc.
International Link Services, LLC
International Telecom Network LLC
Internext Communications
Interpublic Group of Companies (IPG)
Inttel Carrier
Jazztel
Junction Networks
Jupiter Telecom, Inc.
Keyspan Communications
Konfer Technologies, Inc.
Kytel International Group Inc.
Last Mile Connections
LD. Exchange.com
Level 3
Lexent
Looking Glass Networks
MCI
Media.net Communications, Inc.
Megh Communications
Meridian Access Group
MFS
Microwave Satellite Technologies
Monmouth Internet
MultiNet Communications
Mzima Networks
NACT, Inc
Nairn Engineering Group
Navigata Communication Inc-
Neon Communications, Inc
Net Access Corporation
Net Sentry
NetOne International
Network Alliance Group
Next Generation Telecom
nLayer Communications
NOS Communications, Inc.
NovaStar Home Mortgage Inc.
Novatel, Inc
nTera Inc/Radiant
NYFIX
NYSERNet
NYTEL CORP
OnFiber Communications
Optigate Networks, Inc
Orca Wave
Outsource Service Group
PEC/DDL INC
PPL Telcom, LLC
Primus Telecommunications Inc.
Progress Telecom
ProVectus Communications, Inc.
Public Interest Network Services, Inc.
Qwest Communcations
R@D Network Services, Inc
RAI Networks
Rainbow Broadband
RCN Telecom Services, Inc.
RNK Telecom
SAVVIS, Inc
Saycor LTD.
Scion Communication Partners, LLC
SIAC
Singtel USA Inc
Sirius Telecom
SPRINT
Stealth Communications, Inc.
Stealth Telecommunications, LLC
Switch & Data/Paix
Switch and Data
TDC Carrier Services USA, Inc.
TDS Telecom
TECNet, Inc.
TEK Channel
TelcoGroup
Telecom Argentina USA, Inc.
Teleglobe USA Inc.
Telephonix
Televeiling
Telia
Telia Sonera
Telus Communications
The Telx Group Inc
TIATEL
Time Warner Cable
Time Warner Telecom
T-Mobile
Topaz Communications
Total Computer Systems
Touchstone Communications
Towerstream
Transaction Network Services, Inc. (TNSI)
Transat Communications Inc.
T-Systems
Tyco Telecommunications
UniPoint Holdings Inc
United Networks Ltd
Universal Access
Urban Broadband
UUNET
Vartec Communications
Venture Telecom LLP
Verestar
Verio
Verizon
Versatel Telecom
Viatel
Voipco
VoipME Corp.
Voltaire Network, LLC
VTL, INC. / Viatel
WCI CORP
Web MD
Webair
Westcom Communications
Wiltel Communications LLC
Winstar Communications
World Discount Telephone
XO Communications
Yahoo
Yak Communications
Yipes Enterprise Services, Inc.