Open the India Post Payments Bank app or visit the nearest post office
Log in to your IPPB account using your mobile number and credentials
Check the account details section in the app or passbook
Look at your account opening confirmation SMS or email
Call IPPB customer care and verify your identity to request the account number
Visit your home branch or nearest post office with valid ID proof
Check your bank passbook, account statement, or welcome kit
Use the IPPB account number printed on cheque book, if issued