The Siren number is a nine-figure identifier attributed to each legal unit.
The first eight figures have no meaning, except in the case of public bodies (municipalities, etc.), whose Siren number must start with 1 or 2. The ninth figure is a control figure to validate the number.
This number is not significant; it bears no relation to the characteristics of the enterprise. It is allocated once and is only deleted from the register at the moment of the disappearance of the legal entity (death or terminating all activity in the case of an individual, winding up for a legal entity).