The Bank Identification Number (BIN) 521503 is issued by CITIBANK SINGAPORE LIMITED in SINGAPORE. This is a MASTERCARD DEBIT card with WORLD ELITE level.
BIN (Bank Identification Number), also known as IIN (Issuer Identification Number), refers to the first 6 digits of a payment card number. These digits identify the card-issuing institution, card type, and other attributes used for routing and fraud prevention.
By looking up BIN 521503, you can determine: the card network (MASTERCARD), whether it's a credit, debit, or prepaid card (DEBIT), the card level (WORLD ELITE), the issuing bank (CITIBANK SINGAPORE LIMITED), and the country of issuance (SINGAPORE). This information is useful for payment processors, merchants, and fraud prevention systems.