49 selected
- Not filled in
- L' office des telephones
- L'ONPT du Congo
- L.C.L.
- L.L.C.
- La Bomba
- Lacis Groep
- Landis & Gyr
- Lanka Pay Phones
- Lansdowne Voice Systèmes Ltd
- Lao Telecom
- Lao Telecommunications Co, Ltd
- LastDodo
- Lattelekom
- LCC
- LDDS Metromedia
- LDDS Worldcom
- LDTeleCom
- Le Service des Postes et Télécommunications de Wallis et Futuna
- Leader Communications
- Lebanon Power
- Lebara
- Lebara Mobile
- Lenso
- Lesotho Telecoms Corporation
- LG
- LG Telecom
- Liberfone
- Liberia Phone
- Libertel
- Libertis Telecom
- Lider
- Lidl
- Lietuvos Telekomas
- Light Technologies
- Link
- Lion Card
- Lipetskelectrosvyaz
- Liqin Group
- LMB Greencard
- Logicom
- LogoFon Inc.
- Loko
- Los Angeles International Airport
- Lucent Technologies
- Lwg.com
- Lyca mobile
- LycaTel
- Lynx
- Lyonnaise communications