Discover card check

Client

Discover primary account numbers include 6011, 622126–622925, 644–649, and 65 prefixes per open documentation. Paste for Luhn validation—no Discover network lookup.

Discover vs UnionPay overlap

Six-digit BIN 622126–622925 maps to Discover in this tool. Other 62 prefixes may map to UnionPay—checksum validation is independent of label.

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 Discover test PANs in US-market sandbox checklists.
  • Distinguish Discover 622xxx from UnionPay 62xx heuristics.

Common mistakes to avoid

  • Labeling every 62xx prefix as UnionPay

    Discover occupies 622126–622925 before UnionPay 62 heuristic applies.

FAQ

How to identify Discover by number?

Open-range heuristics on 6011, 622126–622925, 644–649, 65—plus Luhn pass.

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.