What is a BIN or IIN?

The Bank Identification Number (BIN), also called the Issuer Identification Number (IIN), is the first 6-8 digits of a card number. Networks reserve known prefix ranges, so the BIN identifies the scheme such as Visa, Mastercard, Amex, Discover or UnionPay.

Can this tool reveal who owns a card?

No. The BIN only identifies the card network from a public prefix table. It cannot reveal the cardholder, the bank account, or whether the card is active.

Do I have to enter a full card number?

No — and you should not. The first 6-8 digits are enough to identify the network, and everything runs in your browser with nothing uploaded.

Credit Card BIN Checker

Identify the card network from a BIN / IIN prefix.

Credit card BIN / IIN checker

The first 6-8 digits of any payment card are the Bank Identification Number — a public prefix that maps to a card network. This checker matches the prefix against known ranges for Visa, Mastercard, American Express, Discover, JCB, Diners Club, UnionPay and Maestro, and runs a Luhn check when a full number is supplied.

You only ever need the BIN, not a full card number, and everything runs in your browser with nothing uploaded.