BIN and IIN basics
BIN and IIN refer to the leading digits of a card number that can indicate network or issuer ranges depending on data availability. Public format tools can inspect the visible prefix shape.
Limits
Prefix checks do not confirm that a card exists, is active, belongs to a person, has funds, or can be used for payment. They also do not replace payment processor checks.
Common mistakes
Do not collect or paste full real card numbers when a masked or test value is enough. Keep card security codes out of online tools.
FAQ
Can a BIN/IIN change?
Ranges and issuer data can change, and public datasets may be incomplete.
Does this identify a cardholder?
No. It does not identify a person or confirm ownership.