89 ausgewählt
- Nicht ausgefüllt
- I Call
- I-Tel
- I.N.A. Friends Call
- I.P.C.+
- I.T.S.C.,USA.
- IBasis
- IBM
- Icall
- ICE
- ICETEL
- ICI
- ICS, Inc,
- IDC
- Idd
- IDL, Inc.
- IDT
- IDT Mobile
- Ihre Post
- ILD Telecommunications, Inc.
- ILD Teleservices Inc.
- ILK
- IM3
- Immersat
- Imperial
- Impulz Slovenije
- In Touch Telecom
- INC
- Incard
- Incomm
- Indosat
- Infineer
- Info Sphere
- Infostrada
- ING Bank
- Int'l Comm
- Integrity Telecom, Inc.
- Intelcam
- INTELCOM San Marino
- Intellicall Operator Services, Inc.
- Inten Communications
- Inter Com GmbH
- Inter Globe
- Inter Terminal
- Intercall
- Intercarte International
- Interchat
- Intercity
- InterEGI
- Interfracom
- Interglobe
- Interglobe Worldwide Telecommunications Network
- Interglobo
- Interlink
- Interlink Telecomminivations, Inc.
- International Database Communications
- International Discount Telecommunications
- International Dutch Telecom
- International Fun & Games LTD
- International pre-paid company
- International Seafarers
- International Telecom Japan
- International Telecom, Inc.
- International Telecommunication Group
- International TeleLink
- Internet Telecom
- Internetsystem
- interoute
- Interpay
- Intertel S.A.
- InTouch Telecom
- Intracom
- InVox
- IOH
- IPS
- Iradium
- Iran Telecom
- Isicall
- Island
- Isra Phone
- IT&T Communicatie
- ITA
- ITCN
- ITDI
- Itelsa
- ITG
- ITN World
- ITPC
- ITS
- IZI