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BIN 523431 — Lookup & Card Details
Check bank, country, card type, and issuer information for BIN 523431.
What is BIN 523431?
BIN 523431 is issued by Itau Unibanco S.A., from Brazil, on the Mastercard network, as a credit card.
A Bank Identification Number (BIN, or Issuer Identification Number / IIN) is the first 6 to 8 digits of any payment card. It tells the payment network which institution issued the card, what kind of card it is, and where it was issued. For BIN 523431, that institution is Itau Unibanco S.A. in Brazil. The card runs on the Mastercard network. Transactions settle in BRL.
Mastercard is a global network whose BINs fall in the 51–55 and 2221–2720 ranges, accepted at merchants worldwide.
Merchants, fraud teams, ad platforms and developers use BIN data to route transactions, localize checkout, detect chargebacks and decide which card products they accept. BIN 523431 itself is public metadata — it identifies the issuer, not the cardholder.
BIN 523431, digit by digit
Each position in a BIN carries defined meaning under ISO/IEC 7812. Here is how the 6 digits of 523431 break down.
BIN 523431 — frequently asked questions
Which bank issued BIN 523431?
BIN 523431 is registered to Itau Unibanco S.A. in Brazil. The issuing institution is recorded in the card networks' BIN registries and confirmed by the live lookup on this page.
What country is BIN 523431 from?
BIN 523431 was issued in Brazil, where card transactions settle in BRL. Country of issuance is set by the issuing institution's registration, not by where the card is used.
What card network does BIN 523431 run on?
BIN 523431 runs on the Mastercard network as a credit card (Mastercard Black). Mastercard is a global network whose BINs fall in the 51–55 and 2221–2720 ranges, accepted at merchants worldwide.
Is it legal to look up BIN 523431?
Yes. BIN 523431 is public infrastructure data under the ISO/IEC 7812 standard — it identifies the issuing program, not any cardholder. No personal or account data is involved in a BIN lookup.
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