Card BIN, the bank identification code, the full English name is BankIdentificationNumber, is the first 6 digits of a credit card or debit card number. It is assigned to bank card organizations by the ISO International Standardization Organization and is used to distinguish different card issuers. . These 6 digits are an important part of the card number and contain the identification information of the card issuer.

On the front of a credit card, common information includes the name of the card issuing bank, credit card brand logo, card number (including BIN number), cardholder name, activation date and expiration date. New credit cards are also equipped with chips, and their accounts are independent from magnetic stripe accounts, providing a higher level of security. On the back, there is a magnetic strip, signature field, service hotline number, part of the card number (for verification) and a security code for transaction verification and protection of the cardholder's rights.

As a financial instrument, credit card has unique properties. It does not encourage depositing cash up front, but supports repayment after consumption, usually with an interest-free period, and provides installment repayment options. It is also internationally accepted and has joined credit card organizations such as VISA and MasterCard. Credit cards integrate payment and credit. Users can make purchases and obtain bank loans within the limit. As a high-tech product, it simplifies the transaction process, enhances security, promotes commodity circulation, and plays a positive role in promoting social and economic activities.

In general, card BIN is an important symbol of card identity. It plays a key role in payment and financial services and is an important part of modern financial life.