France SIREN Validator
Validate French Company ID
Enter a French Company Identification Number to verify its validity.
About this Validator
This tool validates French Company Identification Numbers according to official format requirements.
The validator checks if a given SIREN follows the correct structure and verifies its Luhn check digit.
This validation only confirms if a SIREN follows the correct format. It does not verify if the number is actually registered with French authorities.
What is a French SIREN (Système d'Identification du Répertoire des Entreprises)?
SIREN Structure: • Total length: 9 digits • First 8 digits: Sequential number • Last digit: Luhn check digit • No embedded information • Used in SIRET with NIC suffix
Validation Features: • Number length verification • Format compliance • Luhn algorithm check • Range validation • Pattern verification
Used for: • Business registration • Tax identification • Legal documentation • Government procedures • Commercial contracts • Financial transactions
Technical Notes: • Luhn modulus 10 check digit • All digits are numeric • No special sequences • Base for SIRET numbers • Part of INSEE system
If you need to generate a SIREN for testing purposes, here is a French SIREN Generator