What is the official contact address of Sunil Bharti Mittal?

Mr. Sunil Bharti Mittal can best be reached through his offices at Bharti Enterprises, Ltd., which are located at Bharti Crescent, 1, Nelson Mandela Road, Vasant Kunj, New Delhi, Delhi 110070. His telephone number there is 011-46666100 01 or 1-46666500, and his fax number is 011-46666137. His email address seems to be non-public information.