The Bank Identification Number (BIN) 521776 is issued by JOINT STOCK COMPANY SUBSIDIARY BANK ALFA-BANK in KAZAKHSTAN. This is a MASTERCARD CREDIT card with PREFERRED BUSINESS 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 521776, you can determine: the card network (MASTERCARD), whether it's a credit, debit, or prepaid card (CREDIT), the card level (PREFERRED BUSINESS), the issuing bank (JOINT STOCK COMPANY SUBSIDIARY BANK ALFA-BANK), and the country of issuance (KAZAKHSTAN). This information is useful for payment processors, merchants, and fraud prevention systems.