The Bank Identification Number (BIN) 556680 is issued by CITIBANK N.A. in HONG KONG. This is a MASTERCARD CREDIT card with CORPORATE 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 556680, you can determine: the card network (MASTERCARD), whether it's a credit, debit, or prepaid card (CREDIT), the card level (CORPORATE), the issuing bank (CITIBANK N.A.), and the country of issuance (HONG KONG). This information is useful for payment processors, merchants, and fraud prevention systems.