FM 16-01 Chapter 16 · Validation and test data
Check digits
Validate or compute IBAN, Luhn, EAN/UPC, ISBN, ISSN, CVR and CPR check digits, type detected from the input.
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Usable as a step in ChainIBAN Valid
- Formatted
- DK50 0040 0440 1162 43
- Country
- Denmark (DK)
- Length
- 18 of 18
- Check digits
- 50
- BBAN
- 00400440116243
Auto-detect lists every type the input fits, passing ones first: an 8-digit number can be a CVR, an EAN-8 and an ISSN at once. A valid check digit only means the number is well formed, not that it exists or is in use. IBAN lengths from the SWIFT IBAN Registry; ISBN hyphen positions depend on registrant ranges and are not shown.