The Bank Identification Number (BIN) 621741 is issued by BANK OF CHINA (HONG KONG) LIMITED in HONG KONG. This is a CHINA UNION PAY DEBIT card with PERSONAL 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 621741, you can determine: the card network (CHINA UNION PAY), whether it's a credit, debit, or prepaid card (DEBIT), the card level (PERSONAL), the issuing bank (BANK OF CHINA (HONG KONG) LIMITED), and the country of issuance (HONG KONG). This information is useful for payment processors, merchants, and fraud prevention systems.