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PESEL / NIP / REGON Validator — Check Polish ID and Tax Numbers

Validate Polish PESEL, NIP and REGON numbers by their check digits, and read the date of birth and sex from a PESEL. Paste up to 500 numbers, one per line.

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The type is detected from the length: 11 digits PESEL, 10 NIP, 9 or 14 REGON. Only check digits are verified, not the registers.

Limite: 100.000 unidades UTF-16 por entrada e 1.000.000 por resultado. Veja os formatos e exemplos abaixo.

Resultado

Introduza dados ou carregue um exemplo e execute a ferramenta. O resultado aparece aqui.

Como usar

  1. Paste PESEL, NIP or REGON numbers, one per line (NIP may include PL and dashes).
  2. Run the check.
  3. Each line shows ✓ or ✗ and the type; a valid PESEL also shows the date of birth and sex.

Exemplo

44051401359 → ✓ PESEL, 1944-05-14, male
123-456-32-18 → ✓ NIP

Detalhes e limitações

PESEL encodes the birth date: the month has 20 added for 2000–2099 (and 80, 40, 60 for other centuries), and the tenth digit is odd for men and even for women.

Check digits: PESEL weights 1-3-7-9, NIP weights 6-5-7-2-3-4-5-6-7 (mod 11), REGON 8-9-2-3-4-5-6-7 (mod 11). Numbers stay in your browser.

FAQ

How do I read the date of birth from a PESEL?

The first six digits are YYMMDD. For people born in 2000 or later, 20 is added to the month: 02 in position 3–4 means February 19xx, 22 means February 20xx.

Can it tell whether a NIP is active for VAT?

No. Use the official VAT taxpayer list (biała lista) for that; this tool only checks the number’s check digit.

Is a number with a correct check digit always real?

No. It is only internally consistent; it may not be assigned to anyone.

Referências de formatos

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