NIR (INSEE) Validator

Validate and decode French social security numbers (Numéro de Sécurité Sociale)

Validate NIR
Enter a 13 or 15-digit NIR number
Validation Result
Decoded NIR information

Enter a NIR to validate

About NIR

What is NIR?

NIR (Numéro d'Inscription au Répertoire) is the French social security number, also called 'numéro de sécurité sociale'. It's a 15-digit identifier assigned at birth or immigration.

NIR Structure

S AA MM DD CCC NNN KK

  • S: Gender (1=male, 2=female)
  • AA: Birth year (last 2 digits)
  • MM: Birth month (01-12)
  • DD: Birth department (01-95, 2A, 2B, 97-99)
  • CCC: Commune code
  • NNN: Order number in registry
  • KK: Check key (97 - number mod 97)