1. The bank number of the opening bank refers to the unique identification of the bank in the region where the cardholder handles the account opening business. The bank number of a bank is the national bank code, and each bank will have its own bank number. At present, there are a large number of branches of domestic banks, and only by using the bank number can we effectively distinguish which branch the bank is. The bank number of the Bank is mainly used for the cross-regional payment and settlement business of the Bank. Usually, the bank number of a bank has 12 digits, which is usually 3 digits bank code +4 digits city code +4 digits bank number+1 digit parity bit. . Opening bank refers to the bank that handles the account opening procedures, and the line number is the only identification symbol of a regional bank. Because each bank has a large number of branches, only the bank's line number can effectively distinguish which branch the bank is.

Second, the bank line number is mainly used for the cross-regional payment and settlement business of banks. The specific use method is to fill in the company's account and name first, then fill in the bank line number, and finally fill in the amount.

3. How to check the bank address and branch number of the bank card? We take ICBC as an example:

1, ICBC bank inquiry method can be via SMS, you can directly edit the SMS to 95588, and you can receive a SMS reply to tell your ICBC bank, and use ICBC SMS to inquire about the bank. The specific steps are: send KHH# card number or account number to 95588.

2. Call ICBC customers directly for consultation. If you use a passbook, your passbook number will show your bank information. Call ICBC customer service at 95588 for consultation. If you are inquiring about ICBC bank cards, you must enter them yourself.

3. If it is a passbook, the 4 digits of your 19 deposit certificate or the 5th to 8th digits of the passbook account number are your bank number. You call 95588 and tell the labor agent your ICBC bank number, and it will find your bank address.