41 ausgewählt
- Nicht ausgefüllt
- R.M.O. Worldwide Phonecards
- Rabobank
- Racing
- Radicall
- Radiomidun
- Rafi telecom
- Ranitel
- Rasca Y Gana
- RBL Telecom
- Red
- Red Bull Mobile
- Red Tango
- Red Tone
- RediCall
- Redstone
- Regie voor Telegraaf en Telefoon
- Relieve Telecom
- Remote Memory Canada
- Republika Srpska Telekard
- Réseau TELE 2.
- Riches
- RinGo
- Rio
- Rogers
- Romtelecom
- Roshan
- Royal
- Royal Air Force Museum
- Royal Telecom
- RSL
- RSL Com
- RSL COM Deutschland GmbH
- RSL COM Primecall, Inc.
- RSL Communications
- RSL prime call
- RSLCOM
- RStelecom
- RT Bratislava
- Rubicom/Symacom
- Run
- Rwandatel