Toll Free: 18(Phone Banking),18(Any Query),18(Phone Banking) OBC Bank Merged Into Punjab National Bank (PNB). Contact. 18(Phone Banking Services) Internet Banking Link. Punjab National Bank is an Ideal destination for all Banking need! PNB offer a wide range of personal banking services including loans, credit cards, savings. To report unauthorised or fraudulent electronic transactions in your account; For account enquiries; For debit card operations; For internet and mobile banking; For.