BIN 511846 — Lookup & Card Details

BIN 511846 is issued by Cathay United Bank, from Taiwan (Province of China), 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 511846, that institution is Cathay United Bank in Taiwan (Province of China). The card runs on the mastercard network. Transactions settle in TWD.

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 511846 itself is public metadata — it identifies the issuer, not the cardholder.