Unique number identifying the companies. Its format depends on the country.
In France, it presents as follows :
- For traders and companies, RCS VILLE X SIREN, where VILLE is the name of the town/city where the company is registered, Xtakes A for traders and B for the companies and SIREN is the SIREN number.
- For people registered with the chamber of work and craft, SIREN RM NNN, where SIREN is the SIREN number, and NNN a group of describing the chamber of work and craft.
- For the professions, it is the SIREN number.