The Bank Identification Number (BIN) 521676 is issued by FIRST NATIONAL BANK in UNITED STATES. This is a MASTERCARD DEBIT card with PREPAID HSA NON-SUBSTANTIATED 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 521676, you can determine: the card network (MASTERCARD), whether it's a credit, debit, or prepaid card (DEBIT), the card level (PREPAID HSA NON-SUBSTANTIATED), the issuing bank (FIRST NATIONAL BANK), and the country of issuance (UNITED STATES). This information is useful for payment processors, merchants, and fraud prevention systems.