Aller au contenu
Outils de conversion

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.

Conversion dans le navigateur · Sans inscription

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 unités UTF-16 par entrée et 1 000 000 par résultat. Consultez les formats et exemples ci-dessous.

Résultat

Saisissez des données ou chargez un exemple, puis lancez l’outil. Le résultat apparaîtra ici.

Mode d’emploi

  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.

Exemple

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

Détails et limites

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.

Références des formats

Page de l’outil mise à jour le :