Business & Payments
BIN
Bank Identification Number — the first digits of a card number identifying the issuing bank.
The BIN (Bank Identification Number) is the first six to eight digits of a card number, identifying the issuing bank, card network, card type, and country of issue. Every merchant and payment processor reads the BIN before anything else — it determines routing, applicable fees, and, critically, the initial trust score a transaction receives.
For media buyers, BIN quality is the difference between a card that spends and a card that gets an ad account flagged. Ad platforms maintain internal reputation on BINs: ranges abused by carding or mass account farming get elevated scrutiny or outright declines. Teams track which BINs from their card provider bind cleanly to Facebook or Google, and rotate away from ranges that start catching risk-payment flags.
In buyer speech
“That 5311 BIN is toast — three declines in a row on binding, ask support to reissue the batch on the US range.”