120 geselecteerd
- Niet ingevuld
- M1
- Mabuhay
- Maghreb
- Magictel.com
- Magyar Posta
- Mahanagar Telephone Mauritius Limited
- Makedonski telekomunikacii
- Malawi Telecom
- Malitel
- Maltacom
- Mannesmann
- Manx
- Manx Telecom
- Maps Telecom
- Maraton
- Marconi Comunicações Globias
- Maroc
- Maroc Telecom
- Master
- Mastercom
- Matáv
- Matrix
- Mauritius Telecom
- Maurius tèlècom
- Max Mobil
- Max Tel
- Maxi
- Maxi Afrique
- Maxis
- Maxminutos
- MC & C Telecom
- MCC
- MCI
- MCI Communications
- MCI International, Inc.
- MCI WorldCom
- MCN
- Median Telecom
- Medion Mobile
- Méditel
- Megaphone Telecom
- Menatel
- Merchantrade Asia Sdn. Bhd.
- Merci Card International
- Mercury
- Mercury Communications
- Mercury Teleservice
- Merkur Telekom Ltd.
- Merrick
- Meta
- Metro
- MGT
- MGTS - Moscow
- Michigan Bell
- Migros mobile
- Millecom
- Millennium
- Minolta
- Minut
- Minute Max
- Minutissime 9 Telecom
- Minutissime Telecom
- Miracle Planet
- Mitelco
- Mkitra
- MLS TM
- MM Card
- MMT
- Mobika
- Mobiklik
- Mobikom
- Mobil Halo
- Mobil Oil
- Mobilaire
- Mobile 8
- Mobile Ghana
- Mobile Malaysia
- Mobile Telecommunications Company
- Mobile Telephone Networks
- Mobilkom
- MobiLux
- MobiNed
- MobiNil
- Mobistar
- Mobitel
- Moldcell
- Moldtelecom
- Monaco Telecom
- Mondex
- Monétel
- MoneyGramm
- Mongolian Telecommunications Company
- Monotel
- More Minutes
- Moreminutes
- Moscow City Telephone Network
- Moscow Electrosvyaz
- Movicom Bell South
- Movilnet
- Movistar
- Mox Telecom AG
- MTC
- MTML
- MTN
- MTS
- Multi
- Multi-Acces AG
- Mundi
- Mundi Telecom
- Munditel
- Mundo
- Mundo TMBC
- Mundophone
- Mundophone Telekommunikationsges. mbH
- My Beach
- My Card
- My.t mobile
- My.t.mobile
- Myanma Posts and Telecommunications
- Myanmar Posts and Telecommunications