Mahanagar Telephone Nigam Limited, d/b/a MTNL, is a wholly owned subsidiary of Bharat Sanchar Nigam Limited headquartered in New Delhi, India. MTNL Provides services in the metro cities of Mumbai and New Delhi in India and in the island nation of Mauritius in Africa.
After April 1, 2004, the phone numbers can be carried from network to network. That means any of the previous codes can refer to any mobile provider. There's internal roaming between Telenor and Telekom. Mobile numbers are 7 digits long, and look like this: +36 XX 123 4567. DIGI Move (Virtual) also uses Telenor's network with the same prefix.