The Bank Identification Number (BIN) 521231 is issued by SERFITEX SAPI DE CV SOFOM ENR in MEXICO. This is a MASTERCARD CREDIT card with STANDARD 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 521231, you can determine: the card network (MASTERCARD), whether it's a credit, debit, or prepaid card (CREDIT), the card level (STANDARD), the issuing bank (SERFITEX SAPI DE CV SOFOM ENR), and the country of issuance (MEXICO). This information is useful for payment processors, merchants, and fraud prevention systems.