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Index/Topics/Credit card validation

Credit card validation

The process of validating credit card numbers to ensure they are real and active.

Fact-Checks

1 result
Jan 22, 2026

Can a random 16-digit number pass as a valid credit card using format checks only?

can sometimes pass common format-only credit‑card checks—regular-expression rules, issuer prefix (IIN/BIN) patterns, and the checksum—without being an actually . Passing those format tests does not pr...