O/o GM(TY), Karkardooma Telephone Exchange, Plot No.5,Institutional Area, Karkardooma, Delhi-110092.
Mahanagar Telephone Nigam Limited
भारतीय दूरसंचार विनियामक प्राधिकरण
Telecom Regulatory Authority of India
(IS/ISO 9001:2015 Certified Organisation)