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    2. Email id: ongcdelhicc@ongc.co.in

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• Head Co-ordination, ONGC
• Deendayal Urja Bhawan, 5A, Nelson Mandela Marg, Vasant Kunj, New Delhi-110070
• Telephone: 011-26750111 (Office), 011-26129091 (Fax)

• Frontier Basin
• Basin Manager
• ONGC, IDT Campus, Kaulagarh Road, Dehradun-248195
• Telephone: 0135-2758778 (Office), 0135-2753639 (Fax)
•  
• GEOPIC
• Head GEOPIC
• ONGC, GEOPIC, KDMIPE Campus, Kaulagarh Road, Dehradun
• Telephone: 0135-2758626 (Office), 0135-22795879 (Fax)
•  
• Institute of Drilling Technology (IDT)
• Head IDT
• ONGC, IDT, Kaulagarh Road, Dehradun PIN-248 195
• Telephone: 0135-2756109 (Office), Fax No.: 0135 275 8926
•  
• Keshava Deva Malaviya Institute of Petroleum Exploration (KDMIPE)
• Head KDMIPE
• ONGC, KDMIPE, 9 Kaulagarh Road, Dehradun-248 195
• Telephone: 0135-2753193 (Office)Fax No. : 0135-2755265
•  
• ONGC Academy
• Head ONGC Academy
• ONGC Academy, KDMIPE Campus, Kaulagarh Road, Dehradun-248195
• Telephone: 0135-2754283 (Office), Fax Number - 0135 -2758832

• Tripura Asset
• Asset Manager
• ONGC, Badarghat Complex, Agartala (Tripura West) - 799014
• Telephone: 0381-2374300 (Office), Fax No.: 0381-2374288

• Ahmedabad Asset
• Asset Manager
• ONGC, Avani Bhavan, Chandkheda, Ahmedabad-380005
• Telephone: 079-23266521 (Office), 079-23291289 (Fax)
•  
• Institute of Reservoir Studies (IRS)
• Head IRS
• ONGC, IRS, Chandkheda Ahmedabad-380005
• Telephone: 079-23291704 (Office)

• Ankleshwar Asset
• Asset Manager
• ONGC, Ankleshwar-393010, Distt: Bharuch, Gujarat
• Telephone: 02646-237500 (Office), 02646-246926 (Fax)

• Cambay Asset
• Asset Manager
• ONGC, P.O. Kansari, Khambhat,
• District Anand, Gujarat-388630)
• Telephone: 02698-221105 (Office), 02698-221384 (Fax)

• Cauvery Basin
• Basin Manager
• ONGC, Thalamuthu Natarajan Bldg. (CMDA Tower-I)
• No.1, Gandhi Irwin Road, Egmore, Chennai - 600 008
• Telephone: 044-28542500 - 2510 (Office), 044-28542555 (Fax)

• Institute of Petroleum Safety, Health & Environment Management (IPSHEM)
• Head IPSHEM
• ONGC, IPSHEM, P.O. Via Velim, Betul, South Goa 403723
• Telephone: 0832-2677001 (Office), 0832 –2677029 (Fax)

• Hazira Plant
• Plant Manager
• Hazira Plant, PO ONGC Nagar, Surat-394518
• Telephone: 0261-2875600 (Office), 0261-2875575 (Fax)

• Rajasthan Forward Base
• Head Forward Base
• Rajasthan Forward Base, ONGC, WoB,
• ONGC, KDM Complex, Mandore Road, Jodhpur-342 026
• Telephone; 0291-2572396 (Office), 0291-2571027 (Fax)

• Jorhat Asset
• Asset Manager
• Luit Bhawan, ONGC, Cinnamara Complex,
• P O : Cinnamara, Dist : Jorhat , Assam, PIN: 785704
• Telephone: 0376- 2360011 (Office), 0376-2360012 (Fax)
•  
• Jorhat Basin
• Basin Manager
• Luit Bhawan, ONGC, Cinnamara Complex,
• P O : Cinnamara, Dist : Jorhat , Assam, PIN: 785704
• Telephone: 0376- 2360011 (Office), 0376-2360012 (Fax)

• Kakinada Asset (Eastern Offshore Asset)
• Asset Manager
• ONGC, EOA, II Floor-South Block, Subhadra Arcade, Bhanugudi
• Junction, Kakinada 533 003
• Telephone: 0884-2374100 (Office), Fax No.: 0884-2374104

• Karaikal Asset
• Asset Manager
• ONGC, Neravy Office Complex, Neravy (PO), Karaikal - 609 604
• Telephone: 04368-238890 (Office), 04368 -238126 (Fax)

• MBA Basin
• Basin Manager
• ONGC, 2-4 Floors, Technopolis Building, Salt Lake City, Block BP, Sector V, Kolkata - 700091
• Telephone: 033- 2340-4000 (Office), 033- 2367-2144 (Fax)

• Bokaro Asset
• Asset Manager
• 1^st Floor, HSCL Building
• Bokaro Steel City Bokaro: 827001.
• EPABX / DID: 06542- 2442XX (Office), 06542 - 226666 (Fax)

• Bhubaneswar
• Head
• ONGC, 2^nd Floor, Block-1
• BMC Bhabani Office Complex, Sahid Nagar Bhuwaneswar - 751007
• Telephone: 0674-2544224 (Office)

• Mehsana Asset
• Asset Manager
• ONGC, KDM Bhavan, ONGC, Mehsana Asset, Palavasana, Mehsana-384003
• Telephone: 02762-225430 (Office), 02762-225811 (Fax)

• Western Offshore Assets
• Executive Director – Western Offshore
• C-806, 8th Floor, ONGC Vasudhara Bhavan, Western Express Highway, Bandra (East), Mumbai – 400051
• Telephone : 022-2656-2820 (Board)
•  
• Mumbai High Asset
• Asset Manager
• C-803, 8th Floor, ONGC, Vasudhara Bhavan, Western Express Highway, Bandra (East), Mumbai – 400051
• Telephone : 022-2656-2803 (Office)
•  
• ONGC 11 High Office Complex
• Bandra Sion Link Road Dharavi, Mumbai - 400017
• Neelam & Heera Asset
• Asset Manager
• C -851, 8th Floor, ONGC, Vasudhara Bhavan, Western Express Highway, Bandra (East), Mumbai – 400051
• Telephone : 022-2656-2851 (Office)
•  
• Bassein & Satellite Asset
• Asset Manager
• C -808, 8th Floor,ONGC, Vasudhara Bhavan,Western Express Highway, Bandra (East) Mumbai – 400051
• Telephone : 022-2656-2808 (Office)
•  
• Western Offshore Basin
• Basin Manager
• Q1/A+, 7th Floor, NBP Green Heights, Plot C-69, Bandra Kurla Complex, Bandra (East), Mumbai – 400051
• Telephone : 022-2627-4701 (Office)

• Institute of Oil & Gas Production Technology (IOGPT)
• Head IOGPT
• ONGC Complex, Phase-II, Panvel, Navi Mumbai – 410221
• Telephone: 022-27486000
• /6997/6998 (Office), 022-27451690 (Fax)
•  
• Institute of Engineering & Ocean Technology (IEOT)
• Head IEOT
• ONGC Complex, Phase-II, Panvel, Navi Mumbai – 410221
• Telephone: 022-27451893 (Office), 022-27486350 (Fax)

• Assam Asset
• Asset Manager
• ONGC, Nazira, District-Sivasagar, Pin-785685, Assam
• Telephone: 03772-252300 (Office), 03772-252243 (Fax)

• Rajahmundry Asset
• Asset Manager
• ONGC, Godavari Bhavan, Base Complex, Rajahmundry-533 106, East Godavari District (A.P.)
• Telephone: 0883-2424348 (Office), 0883-2434386 (Fax)
•  
• Krishna Godavari - Pranahita Godavari Basin
• Basin Manager
• ONGC, Godavari Bhavan, Base Complex, Rajahmundry-533 106, East Godavari District (A.P.)
• Telephone: 0883-2494100 (Office), 0883-2440670 (Fax)

• Cachar Forward Base
• Head Forward Base
• ONGC, Srikona, Silchar-788026, Dist. Cachar, Assam,
• Telephone: 03842-229022 (Office), Fax No.: 03842-268951

• Uran Plant
• Plant Manager
• ONGC, Dronagiri Bhavan, Uran, Distt Raigad 400702
• Telephone: 022-27222802 (Office), 022-27222811 (Fax)

• Western Onshore Basin
• Basin Manage
• ONGC, Makarpura Road, Vadodara – 390009
• Telephone: 0265-2638864 (Office), 0265-260-5400 (Board No.), 0265-2641260 (Fax)
•  
• Centre for Excellence in Well Logging Technology (CEWELL)
• Head CEWELL
• ONGC, Makarpura Road, Vadodara – 390009
• Telephone: 0265-2631497 (Office), 0265-2643873 (Fax)