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National ID number validator
Validate national identification numbers for multiple countries using their official checksum algorithms. Supports UK NINO, NL BSN and more.
- Free, no sign-up
- No data stored
- Reviewed 2026-01-15
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About the National ID Validator
Validate national identification numbers from various countries against their official algorithms: UK National Insurance Number (NINO), Dutch BSN, Spanish NIE/NIF, Belgian national number and others. Select the country scheme and enter the number.
How to use the National ID Validator
- Select the country/scheme.
- Enter the ID number.
- View validation result.
- For bulk: paste multiple numbers.
Frequently asked questions
Which countries are supported?
Currently: UK (NINO), Netherlands (BSN), Spain (NIF/NIE), Belgium, Portugal (NIF), and more. The list expands over time.
Does this confirm identity?
No. Only structural and checksum validity. No government database is queried.
What is a NINO?
UK National Insurance Number. Format: 2 letters, 6 digits, 1 letter (e.g. AB123456C). Used for tax and benefits.