Validating SIREN/SIRET France
Validate a 9-digit SIREN number or 14-digit SIRET with the Luhn algorithm. Includes probable region and office type.
Insertion and Validation
Come utilizzare Come utilizzare questo validatore
Enter SIREN or SIRET number
Enter a SIREN number (9 digits) or SIRET number (14 digits). Spaces and hyphens are automatically ignored.
Choose Validation Mode
In automatic mode, type is detected based on length. You can force validation of SIREN or SIRET.
Read Results
Validator shows: Luhn validity, probable region, legal office/branch distinction for SIRET.
Suggerimenti
- The NIC 00001 in a SIRET always indicates the company's legal seat.
- The first three digits of the SIREN number approximately correspond to the department of constitution (not always, however, for large national enterprises).
- The Post Office (SIREN 356000000) uses a special convention - its SIREN starts with 35 but remains valid globally according to Luhn.
Domande frequenti
What is the SIREN?
The SIREN (Systeme d'Identification du Repertoire des ENtreprises) is a unique 9-digit identifier assigned by INSEE to every company registered in France. It identifies the company itself.
What is the SIRET?
The SIRET (Systeme d'Identification du Repertoire des ETablissements) is made up of the SIREN (9 digits) + NIC (5 digits, internal classification number). It identifies a specific establishment. NIC 00001 = head office.
How does Luhn validation work for SIREN/SIRET?
The Luhn algorithm scans digits from right to left, doubles every other digit, subtracts 9 if the result exceeds 9, and sums everything. If the sum is divisible by 10, the number is valid.
Is a SIREN that passes the Luhn check necessarily active?
No. Luhn validation only checks the consistency of the number, not its existence in the INSEE register. To verify that a company is active, check the INSEE Sirene API or the societenumerique.fr website.