List of BSNL all USSD codes which can help BSNL Users to Check Own Number, Balance, Data, Offers, and Other Value Added Services available on BSNL network. USSD (Unstructured Supplementary Service Data) Codesof BSNL for Balance Enquiry, Tariff Plans, Last 5 Call, Recharge and many more. All BSNL USSD Codes of 2018