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Bin Code Meaning

A Bank Identification Number (BIN), sometimes called a BIN code, is the first four to six digits of a payment card number. This sequence identifies the financial institution that issued the card and the card’s brand (such as Visa or MasterCard). Merchant systems and payment processors use the BIN during authorization to route transaction requests and to perform fraud checks.

By examining the BIN, a merchant can determine the card type, issuing country and sometimes the cardholder’s bank. This information helps speed up transaction processing and enables the detection of suspicious patterns that could signal stolen or counterfeit cards. BINs are also used to assess processing fees and to comply with geographic restrictions on certain products.

As payment systems evolve, card networks are transitioning from six‑digit BINs to eight‑digit identifiers to accommodate a growing number of issuers. Merchants and processors must update their systems to recognize the longer codes and maintain accurate routing.

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