1.951 ausgewählt
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- Titanium World
- TMBC
- TMBC/More Minutes
- TMF
- TNC
- TNT
- Toggle
- Togo Telecom
- Tommy Telecom
- Top 20
- Top Card
- Top Plus
- Torc Telecom
- TOT Corporation Public Company Limited
- Total Call
- Trade Service
- Trans Jordan for Communications Co. Ltd.
- Transtel
- Travel Card
- Treasury
- Tree Telecom
- Triangle Communications
- Tricom
- Trident Prepaid
- Triunfo
- Trojan Technologies
- True mony
- True move
- TrueMove H
- TSG Lanka Payphones
- TSI
- TSTT
- TTG
- TTL
- Tunes
- Tunesë Telecom
- Tunisiana
- Tunisie Telecom
- Turk
- Türk Telekom
- Turkcell
- Turkey
- Turku Telephone
- Turun
- Turun Puhelin
- Tuvalu Telecom
- TV Plus
- U.C.N.
- U.N.I.
- U.S. Digitel
- U.S. South
- U.S. Wats
- U.S.South
- UdmurtTelecom
- UK Based Remotes
- Ukrtelecom
- Ultimate Communications
- Un1ca
- Uni 2
- Uni call
- Uni2
- Unica
- Unicall
- Unicard
- Unicom
- UniDial
- Union Telecom Alliance
- Uniphone
- UniqueAir
- Unisource
- United States Postal Service
- United Telecom
- United Telecommunication Services
- Unitel
- Unitel / Unicom
- Universal
- Universal Connections
- Universal Network Services
- Universe
- Universel
- Uno Telecom
- UP & TC
- UPC
- UPC mobile
- Uralsvyazinform
- Urmet
- US South
- US West
- USACard
- USLD
- USWest
- UTI
- Vectone
- Vectone Mobile
- Verizon/MCI
- Vermaat telecommunicatie
- VIAG Interkom
- Viatel
- Viettel
- Viking
- Viking Line
- Vimpelcom
- Vini
- Vipnet
- Virgin
- Vision Tech Solution Sdn. Bhd.
- Vitesse mobiel
- Viva
- Viva Africa
- Viva Telecom
- Vivacalls
- Vivacalls.com
- VO Call
- VoCall
- VOCall Communications Corp.
- Vodacom
- Vodafone
- Vodafone D2
- Vodago
- Vofafone
- Voice
- Voice Telecom
- Voicenet / Norby
- Voicestar Communications Sdn. Bhd.
- VoiceStream Wireless
- VOIP inc.
- Volga Telecom, Nizjni Novgorod
- Voxdirect
- Voxtel
- Vrije Universiteit
- Vssite
- VSV
- VTR Larga Distancia
- W.C.S.
- W.T.N., inc.
- Walgreens
- Walt Disney
- Wataniya Telecom
- WeChat go
- West Coast Communications
- Westel
- Westel Ghana
- Westel Intelcom
- Westel Italia
- Western Union
- Willcom
- Wind
- Windtel
- Winner
- Wise
- World Acces
- World Call
- World Com
- World Phonecard Company
- World Telecom
- World Telecom Center
- World Telecom/Fon-Olé
- World x Change Communications
- World_x_Change
- World_x_Change Communications
- Worldcall
- Worldcall 2000 tm
- WorldCard
- WorldCom
- WorldCom Inc.
- WorldLine Telecom GmbH
- Worldlink
- Worldlink Communications
- Worldnet
- Worldphone
- WorldPhone Asia
- WorldTelecom
- Worldwide
- Worldxchange
- WorldxChange Communications
- WRC Witte Reizen Centrale
- WTB Telecom
- Wuhan Telecom
- WWA
- WXL
- Xafax
- Xantic
- XL
- XL-Call
- XPax IDD
- Xponcard
- Xtec Communication Ltd.
- Xtra Telecom
- XXL
- Yantai Telecom
- Yellow
- Yellowstone General Stores
- Yemen International Telecommunications
- Yes telecom
- YYC Inc.
- Zantel
- Zebra
- Zemen
- Ziggo
- Zipp Telecom
- Zivar Master telecom