Registered Office :
Address : Plot No. 5 A- 5 B,Nelson Mandela Road,Vasant Kunj New Delhi,Delhi-110070 .
Phone : 022-26754073 / 26754085 / 26750111 / 2629000
Email :  secretariat@ongc.co.in
URL : www.ongcindia.com
Industry : Oil Exploration
Listing : BSE,NSE