For Demat Account related queries: 022- 43434688/687/683/680
Email: depository_mum@obc.co.in
Oriental bank of commerce
For Internet Banking related queries: 040-66319345, 27894150
Email: ibank@obc.co.in
For Bank Account related queries
Toll Free: 1800 180 1235, 040-27894150,66319345 (from other landlines and GSM) Standard charges applicable