BIN/IIN lookup: the card prefix ranges and how to look one up (2026)
A practical reference for BIN/IIN lookups: what the issuer identification number is, the table of which prefix ranges belong to which card network, and the three ways to look a BIN up — read it off the ranges yourself, use a lookup site/API like binlist.net, or query it programmatically. Includes the 6-vs-8-digit caveat and what you can and can't tell from a prefix alone.