1,951 selected
- Not filled in
- Phoenix Comms
- Phone Card
- Phone Line International
- PhoneCardsUSA
- PhoneNet
- PhoneSave
- PHONET
- Phonetime
- Phonetime Inc.
- Phoneway
- Phonexion
- Photo Telecom
- PICC Life
- Pick
- Pildyk
- Pin 2000
- Planet
- Planet Communication
- Planet Telecom & Technologies, Inc.
- Planetline
- PLDT
- Plessey
- Plusfort
- PlusTel
- Poczta Polska Telefon Telegraf
- POD
- Polkomtel
- Polska Telefonia Cyfrowa
- Polska Telefonia Komorkowa - Centertel
- Pop Tel
- Porta
- Porta Alo
- Portugal Telecom
- Post & Telecommunication Corporation
- Post and Telecommunication Administration of Shanghai
- Post Luxembourg
- Post NL
- Posta dhe Tele Kommunikacioni I Kosovës
- Postbank
- Poste aux Kerguelen
- Posti- ja telelaitos
- Posts and Telecommunications Corporation
- Posts and Telecommunications corporation of Ghana
- Póstur og sími
- Power
- Powerhouse Marketing Ltd.
- Powertel
- PPC Card Systems
- PPI
- PPS Ltd.
- Première
- Prepay United Kingdom
- Present Perfect
- Prime Call
- Primeurcard
- Primus
- Primus Telecom
- Printel
- Pro XL
- Pronto
- Pronto envios
- Proximus
- PRT
- PT
- PT-1 Communications
- PT-1 one Communications
- PT1 Communications, inc
- PT1 Phonetime Inc.
- PTC
- PTI
- PTL Tele
- PTT
- PTT Algérie
- PTT BIH
- PTT Callshop GmbH
- PTT Genel Müdürlügü
- PTT Jugoslavija
- PTT Krajina
- PTT Macedonie
- PTT Nederland
- PTT Slovenija
- PTT Telecom
- PTT Telecom The Netherlands
- PTT Telecommunicatie
- PTT Télécommunications
- PTT Telekom
- PTT Tunesia
- PTT Vukovar
- Public Phone
- Public Switch
- Publicom
- Publicphone
- Publiphone
- Publitel
- Puhelinyhtiot
- Q-tel
- Qick
- Qtel
- Qualitenor
- QuebecTel
- Queen
- Quest Communications, Inc.
- Quick Tel Communications
- Quik
- Qwest
- Qwest Communications Corp.
- 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
- S.N.P.T Comores
- S.T.E.
- Sabena
- Sachdeva
- Safaricom
- Sakha Telecom - Yakutia
- Sakhalinsvyaz
- Sam's Club
- Samandar
- Samaplast
- Sankt Petersburg Taxophones
- Sat Link 3000
- Satel
- Satelindo
- Satellite Card
- Saudi Telecom Company (STC)
- Savonlinnan
- Schlumberger
- SDI
- Sea King Blue
- Seabird
- Seasons
- Seethru
- Seghwaert
- Self Copy
- Sepa Téléphonique
- Sepatel
- Sercomtel
- Serome
- Servei de Telecommunicacions d' Andorra
- Service Center
- Setar
- Setcall
- Setel
- SFR
- Shaheen
- Shanda
- Shark
- Shell Gabon
- Siemens
- Sierra Leone National Telecommunications Company
- Silja Line
- Silverline
- Síminn
- Simmini
- Simyo
- Singapore tele
- Singapore Telecom
- Sint Lucas
- Sistelcom
- Sistema Telebrás
- Sistema Telebras 00
- SIT
- SK Telecom
- SK Telink
- Sky
- Sky Telcom
- SKY Telecom
- Skybox
- Skytelcard
- Slovak Telecom
- Slovenské Telekomunikácie
- Smart
- Smart Ingenierie
- Smartalk
- Smartalk Teleservices, Inc.
- SmarTel
- Snow
- SNS Bank
- Socatel
- Socati
- Società Italiana per l'Esercizio Telefonico
- Société des télécommunications du Mali
- Sodeco
- Sol Telecom
- Solomon Telekom Company Limited
- Sonatel Mobiles
- Sonatel Senegal
- Sonema
- Sonera
- Sonic
- Sotel Tchad
- Sotelgui
- Southern New England Bell
- SpainTalk
- Spark Telecom
- Sparkasse Aachen
- Speciale Afrique
- Speed
- Speedial
- Sport: Tafeltennis
- Sprint
- Sprint Card
- Sprint Communications
- SPT Telecom
- Sri Lanka Telecom
- SSC
- SSI International
- St. Maarten - Cellular One
- St. Maarten - InterCard
- St. Maarten - Tel Cell
- St.Eustatius Telephone Company
- Staatsdrukkerij en Uitgeverij