UnionPay card check

Client

UnionPay primary account numbers often start with 62 and commonly span 16–19 digits. Discover’s 622126–622925 range is evaluated first. Paste for Luhn and length hints—no UnionPay network query.

UnionPay length

Digit counts from 16 through 19 pass length hints for UnionPay heuristic. Luhn mod-10 still required on the full string.

Sensitive data: checks run only in your browser. Prefer processor-published test card numbers, never live PANs on shared devices.
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Spaces and dashes are stripped before counting digits and running Luhn. Card-network labels come from common public BIN/IIN ranges—they may mismatch exotic co-branded or new ranges.

16 digits after cleanup

Likely network: Visa

Luhn checksum: passes — algorithm-only; does not mean the card is active or genuine.

Common use cases

  • Validate UnionPay sandbox PANs in cross-border QA.
  • Explain 62xx prefix overlap with Discover documentation.

Common mistakes to avoid

  • Assuming all 62 prefixes are UnionPay

    Discover occupies part of the 622xxx space—tool applies range order documented in code.

FAQ

How many digits is UnionPay?

Commonly 16–19 digits—length hint when outside that band.

Common search terms

Phrases people search for that match this tool. See the full long-tail keyword index.

  • credit card luhn check online
  • visa mastercard bin checker browser
  • payment card checksum validator no upload
  • validate primary account number luhn locally
  • discover amex prefix checker heuristic online

More tools

Related utilities you can open in another tab—mostly client-side.