SIREN and SIRET numbers are unique identification codes assigned to businesses and their various establishments by the French National Institute of Statistics and Economic Studies (INSEE).
The SIREN (Système d'Identification du Répertoire des Entreprises) number is a nine-digit identification code assigned to every registered business entity in France. It functions as the main registration number of the business and remains unchanged throughout the lifetime of the business, even if the business moves or undergoes a significant restructuring. The SIREN number is a key element in business-to-government interactions, particularly in the areas of regulatory compliance, financial reporting, and statistical tracking.
A SIREN number comprises nine digits, and its format is entirely numeric. There are no other special characters or alphabetic components involved in the structure of a SIREN number. Its purpose is to serve as the primary identifier of the business, and it must appear on all official documents, such as invoices, contracts, and government filings.