BIN 503303
5033 0379 8442 5449
BIN 503303 is the Issuer Identification Number (IIN) at the start of a card number. It is issued on the Maestro network as a debit card at the Standard level. A BIN identifies the bank and card range only — it never reveals an account number, balance or cardholder.
Card number format for this BIN
Every card number that starts with 503303 follows these Maestro rules. Its last digit is a Luhn check digit calculated from the digits before it, which is why a mistyped number is usually rejected before a payment is even sent.
🇹🇼 Our dataset lists 1,262 BIN ranges issued in Taiwan. See the Taiwan BIN list with its banks, card schemes and card types.
Check another BIN
Enter any card's first 6–8 digits to look up its bank, scheme, type and country.
Open BIN Lookup →Frequently asked questions
What bank issued BIN 503303?
The issuing bank for this BIN is not named in our dataset. A BIN identifies the issuing bank and card range — never an individual account or cardholder.
Is BIN 503303 a credit or debit card?
It is a debit card on the Maestro network.
Can I get full card numbers from a BIN?
No. A BIN is only the first 6–8 digits and public routing information. It reveals the scheme, type, bank and country, but never a full card number, balance or cardholder. The sample on this page is randomly generated and holds no funds.