What is a SIRET?
A SIRET is a 14-digit French establishment identifier. It combines the nine-digit SIREN of the legal unit with a five-digit NIC establishment code. Use SIRET when the question is about a specific location or site; use SIREN when the question is about the legal unit.
- Source file
- Not reported
- Published
- Not reported
- Retrieved
- Not reported
- Snapshot
- Not retained for this reference page
- Re-check
- INSEE: SIRET number
- Data as of
- Not reported
Full name: French SIRET Number
Short explanation
The SIRET number identifies an establishment in France's Sirene register. It is built from the legal unit's SIREN plus a five-digit NIC code assigned to the establishment. That structure makes SIRET useful for location-level questions, such as matching a branch, site, or office. It should not replace SIREN when the fact belongs to the legal unit as a whole.
Related platform: Entity graph - resolved organization records
How it’s used
- French establishment lookup: SIRET points to a specific site, office, or establishment linked to a legal unit.
- Location matching: a company with several establishments can share one SIREN but hold separate SIRET values for each establishment.
- Fonteum treats SIRET as a location-level identifier so addresses and operating sites are not merged into one legal-entity-only record.
Frequently asked questions
- How many digits are in a SIRET?
- A SIRET has 14 digits: the nine-digit SIREN plus a five-digit NIC establishment code.
- What does a SIRET identify?
- A SIRET identifies a specific establishment, such as a site, office, branch, or operating location.
- Why does a SIRET start with a SIREN?
- The SIRET embeds the legal unit's SIREN, then adds the NIC code that distinguishes one establishment from another.
Explore in Fonteum
How Fonteum sources, resolves, and publishes data tied to this term.