Banks will often have multiple BIN's[1] assigned to them. When I was last in the industry ~10 years ago, it was typical to use the BIN to identify specific type

Banks will often have multiple BIN's[1] assigned to them. When I was last in the industry ~10 years ago, it was typical to use the BIN to identify specific types of card within an institution, so it wasn't uncommon to see a single institution with multiple BINs. Something like that could be used to filter out such cards, if they were assigned a unique BIN by the bank. As to whether anyone actually _does_ that, I don't know. [1] The BIN is the first six digits of your card number. It identifies the originating bank, among other things: https://www.investopedia.com/terms/b/bank-identification-number.asp https://www.investopedia.com/terms/b/bank-identification-num...