NIP and REGON validator
We check length, digits and weighted checksums. REGON 14 also validates its first nine digits. Spaces and hyphens in NIP are ignored.
Sources and adopted values
Result breakdown
| Item | Value |
|---|---|
| Fill in the fields above — the result is computed on this page. | |
How do I use this page?
- Enter data and choose a scenario.
- Click Calculate and inspect the result.
What this page does not do: Mathematical validity does not confirm registration, VAT status or company identity. No registry queries are made.
Further reading
Theory — NIP and REGON validator
We check length, digits and weighted checksums. REGON 14 also validates its first nine digits. Spaces and hyphens in NIP are ignored.
Frequently asked questions
How does the calculation work?
We check length, digits and weighted checksums. REGON 14 also validates its first nine digits. Spaces and hyphens in NIP are ignored.
What are the limitations?
Mathematical validity does not confirm registration, VAT status or company identity. No registry queries are made.
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