Mahanagar Telephone Nigam Limited (MTNL) (d/b/a MTNL) is a 'Navratna' Category Public sector undertakings in India which is in turn under the ownership of the Department of Telecommunications, Ministry of Communications, Government of India. 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. It had a monopoly in Mumbai and New Delhi until 1992 when the telecom sector was opened to other service providers. "एमटीएनएल है, तो सही है" {"MTNL hai to sahi hai"} (Meaning: If MTNL is there, then everything is fine) & "Transparency makes us different" is its motto. The Bharat Sanchar Nigam Limited currently holds 100% of its stock.
. As of June 2021, it has 3.28 million subscribers.
It is also a wholly owned subsidiary of a central public sector unit.