1.951 ausgewählt
- Nicht ausgefüllt
- Call Europe
- Call Home
- Calling Card International
- Callmate Telecom
- CallPlus
- Callpoint
- CallTrak
- Camtel
- Canada Phone Card
- Canada Telecom Network, Inc.
- Canon
- Card Phone Australia
- CardCall International
- Cardcaller Canada
- Cardlink
- CardLink Services
- Cash Call
- Cat Telecom Public Company Limited
- Cat.Card
- CB
- CCT
- CDT, L.L.C.
- Cegetel
- Celcom
- Cellcard
- Cellcom
- Cellis
- Cellnet
- Cellplus
- Celltel
- Cellular one
- Cellway
- Celtel
- Centennial
- Centertel
- Central Telecom
- Ceský Telecom
- Cetelem
- Chawaleks
- Cheetah
- Chelyabinskvyazinform
- Chembell
- Chilli
- Chilli Arabien
- China Mobile
- China Netcom
- China Railcom
- China Satcom
- China Telecom
- China Telecom Corporation
- China Tietong
- China Unicom
- Chinese Industry Co.
- Chipknip
- Chippie
- Chitel
- Chithy
- Chunghwa Telecom
- CI-Telcom
- Cii Honeywell Bull
- CIP
- Cirte Manifatturiera
- Citadel
- CitiFon
- City Card
- Citycall
- Claro
- Classic
- Clear Communications
- Clifton
- Clifton Digital
- Clifton Telecard Alliance
- CML, Inc.
- CMOS Communications
- CMPT
- CMV Bank
- CNC
- CNC Communications Network
- Coast to Coast +
- Coast to Coast Communications, Inc.
- Coastcall
- Coinstar
- Collector's Communications
- Colli telecomunicazioni
- Combo
- Comcard Pacific
- Comco SA
- Come Phone
- Comfour
- Comfour Telecom BV
- Cominex
- Comité des PTT et de l'informatique
- Comms
- Communi Card
- Communicard
- Communications
- Communications Design Group Inc.
- Communitel
- Companhia Santomese de Telecomunicações
- Compañía Anónima Nacional de Teléfonos de Venezuela
- Compaq
- Compass Communications
- Comsat
- Comstar
- Comstar Moskau
- ComTel Debit Technologies, L.C.
- Comunitel
- Comviq
- Concorde
- Condor
- Conetco
- Conexus, Ltd.
- Connect
- Connect 'n Save
- Connex
- Conseil
- Contact Telecom
- Continental Telecom
- Converxis
- Copytex
- Cosmo
- Cosmophone
- Cosmote
- Costtel
- Côte d'Ivoire Telecom
- Cotel
- Covadis
- Crabeth College
- Creacomm
- Credifone
- CrossFone
- Crouzet
- CRT
- Crystal
- CSAT
- Csloxinfo
- CTACard
- CTBC Telecom
- CTC - Compañía De Teléfonos De Chile
- CTI
- CTI Móvil
- CTM
- CTMR
- CTN
- CTS Telecom, Inc.
- CTT Cabo Verde
- CTT Telecomunicações
- Cubacel
- Curacao Telecom
- Cute
- Cyberlight
- CyberTron
- Cyprus Telecommunications Authority
- Cyta
- D 2 Privat Mannesmann
- D&N Telecom
- D.C.C.L.
- D.I.T.
- D1
- D1 Telekom
- D1 Telekom ( Hutchison )
- D1 Victorvox
- D2
- D2 Mannesmann Victorvox
- D2 Mannesmann/Vodafone
- D2 Privat
- Dacom
- Daily Card
- Danmønt
- Daruma
- Data Communications LTD.
- Datawave
- Dauphin Telecom
- Davidoff
- DDI
- De Concurrent
- De danske
- Debit
- Debitel
- Decatel
- Dekatel
- Delight Mobile
- Delta
- Delta Multimedia
- Deltacom Industries Ltd
- Delto
- DenDenKoSha
- Destia
- Deutsche Bundespost
- Deutsche Netzwerk Telefonie GmbH (Dentel)
- Deutsche Telekom
- Devil
- Dhiraagu
- Dia-Tel
- Dial Asia
- Dial International
- Dial4Cheap
- Diamond Communications
- Die Post
- Dienst Justitiële Inrichtingen
- Dienst Stadstoezicht Amsterdam
- Digi
- Digicel
- Digit
- Digitec
- Digitec 2000
- Digitel
- Dilman
- Dime Communications, Inc.
- Dinersclub international
- Direct Technologies Inc.
- Discount
- Disney Lucasfilm, Ltd.
- Distinct
- DizzoCom
- Djezzy
- Djibouti Telecom SA
- Dome Telecom
- Domodedovo
- Donpi
- Dr. Nassau college
- Dragon
- Dragon Mobile
- Dresdner Bank
- DSA
- DTAC
- DTSS
- DTT
- Dumon
- Duocom
- Dutchtone
- Dvigrad
- Dynamic Entertainment, Inc.
- Dynamic TeleCard
- E Plus
- E-Com Telecom
- E-Z Ring
- E.T. Tel Communications, Inc.
- E.T.Tel Communications
- E1
- Eagle telecom
- Eagle Telecom InternatIonal
- Easi
- East Caribbean Cellular
- Eastern Telecoms
- Easy
- Easy Call International
- Easy Phone Asia
- Easy PhoneCard
- Easy Topworld