There are two kinds of bank cards. One is debit card, which is called savings card. The card number is usually 19 digits. There are also special circumstances, such as China Merchants Bank, China Construction Bank, and Bank of Communications. The other is a credit card, which is a credit card. All banks have a unified card number of 16 digits. The number of bank card numbers of the following banks: 1. CCB: 16 or 19 digits for savings cards and 16 digits for credit cards; 2. Agricultural Bank of China: 19 digits for savings card number and 16 digits for credit card; 3. ICBC: 19 digits for savings card number and 16 digits for credit card; 4. Transportation: 17 digits for savings card number and 16 digits for credit card; 5. People's livelihood: 16 digits for savings card number and 16 digits for credit card number.
the coding rules of bank card numbers are formulated by the ISO organization, and there is a unified international standard. For the rules, please refer to Bankcardnumber.
in the acquiring industry, the coding rules of bank card numbers are generally referred to as bank identification number.
the length of a credit card is not necessarily 16 digits, but 14, 15 and 16-digit credit cards are available.
the bank card number is generally 16 or 19 digits. It consists of the following three parts. ● The first six digits are: IssuerIdentificationNumber(IIN). Note: IIN has been used to replace the previous BankIdentificationNumber(BIN). The first digit is the MajorIndustryIdentifier(MII), and the following table lists the card number industry represented by each digit of MII.
issuers with different card numbers. Therefore, the card issued by "China UnionPay" must start with 62; In China, people who use Visa credit cards will start with 4, while those who use Matercard generally start with 51, 52, 53, 54 and 55.