AOL
AOL UK
ARtelecom
Belgacom
Belgacom Wireline
Bell Canada
BH Telecom
Bharti Telenet Ltd.
Brasil Telecom
Brightview
BT
BT Action
BT Broadband
BT Exact
BT Global Services
BT Group plc
BT Openworld
BT PLC
BT Retail
BT Wholesale
Bulldog Communications
Cable & Wireless
Cablecom
Cesky Telekom
Chunghwa Telecom
COLT Telecommunications
Deutsche Telekom AG
Dishnet DSL
eAccess, Ltd
Easynet
Eclipse Internet
Elisa Communications
Energis
Fastweb
Fibernet Ltd.
France Telecom
Freeserve.com
Frontier Communications
Fusion
Genesis
Global Crossing
HanseNet Telekommunikation GmBH
Hellenic Telecommunications
Hungarotel Communications
Iceland Telecom
Interoute
Kingston Communications
KPN Royal Dutch Telecom
KT
Lattelekom SIA
Liberty
Libya Telecom
Lintasarta
Manx Telecom
Matav Hungarian Telecom
MCI
MLL Telecom Limited
MyZones Ltd
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NextGen Tel
Nordic LAN&WAN Communication Oy
Novis Telecom SA
NTL
O2
Omantel
One.Tel Broadband
PIPEX Internet Limited
Plusnet
Post and Telecom of Kosova
Primus Telecommunications
Priority Telecom NV
PSINet Europe
PT Aplikanusa Lintasarta
PT COMUNICACOES
PT Telkom
Pupin Telecom
QSC AG
Saudi Telecom
Schmid Telecom UK
Singapore Telecommunications Ltd.
Sonet International Corp.
SONY Online Entertainment
Star Internet
Swisscom
Swisscom Fixnet
Swisscom Wholesale
Taiwan Fixed Network
T-Com
Tecom Co Ltd
Telecom Italia
Telecom Serbia
Telecomunicacoes de Sao Paulo
Telefonica
Telefonica de Argentina
Telefonica de Espana
Telefonica Investigacion Y Desarrollo
Telefonija D.D.
Telekom Malaysia Berhad
Telekom Slovenije d.d.
Telekom Srbija
Telekom Srpske
Telenor
Telewest Broadband
Telia Networks
TeliaSonera
Telenor Norway
TELUS Communications, Inc.
TEOL - Telekom Srpske
Thus Plc
Tiscali
TNO Telecom
T-Systems Nova
Turk Telekomunikasyon A.S.
VarTec TeleCom
Verizon Communications
Vivendi Telecom Hungary Ltd.
Vodafone
Yahoo!
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