BIN 552570 — Lookup & Card Details

BIN 552570 is issued by Bank Millennium S.A., from Poland, 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 552570, that institution is Bank Millennium S.A. in Poland. The card runs on the mastercard network. Transactions settle in PLN.

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 552570 itself is public metadata — it identifies the issuer, not the cardholder.