The French tax authorities issue different numbers to registered businesses. Each of these numbers has a different meaning and format:
Siren Number
SIREN numbers are issued by the Statistical authorities (INSEE). It is made up of 9 numbers. The first 8 numbers do not have any meaning and the 9th digit is only used to double check the logarithm in the first numbers.
Siret Number
SIRET numbers are made up of 14 numbers. The first 9 digits are the SIREN number and the following 5 digits are the NIC number (Numéro Interne de Classement). The SIRET number provides information about the location of the business in France (for established companies).
Source Marosa
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