SIRET Generator Yvelines
4 fake SIRET numbers generated with real addresses from the Yvelines department (78), Île-de-France region. Algorithmically validated, ready for your tests.
Generated Data — Yvelines
Advanced generator| SIRET | SIREN | Company | Address |
|---|---|---|---|
| 978 024 016 83373 | 978 024 016 | Leblanc Carpentier S.A.S. |
89, place Mathieu, 78280 Guyancourt |
| 246 638 993 00377 | 246 638 993 | Peltier SA |
278, rue Bruneau, 78280 Guyancourt |
| 230 390 510 06030 | 230 390 510 | Hoarau Gomez S.A.S. |
52, avenue de Turpin, 78200 Mantes-la-Jolie |
| 305 959 066 00476 | 305 959 066 | Sauvage |
boulevard de Guillaume, 78200 Mantes-la-Jolie |
This data is entirely fictional and does not correspond to any real entity. To generate more sets and export them, use the advanced generator.
Economy and business landscape of Yvelines
The leading industrial department of the Île-de-France region, Yvelines draws its economic identity from the automotive sector, home to Renault's major sites — the Guyancourt Technocentre and the Flins plant — as well as the Stellantis factory in Poissy and the Vélizy hub. The area also hosts a top-tier aeronautics and space industry, exemplified by the ArianeGroup site in Les Mureaux where the main stage of the Ariane 6 rocket is assembled, and it concentrates more than a third of the region's research and development, supported by institutions such as UVSQ and HEC in Jouy-en-Josas. Alongside these cutting-edge activities, cereal farming covers a large share of the territory, and tourism remains anchored by the Palace of Versailles, one of France's most visited heritage sites.
Cities in Yvelines used for generation
The generator uses real cities and postal codes from the Yvelines department to produce authentic addresses:
What is a SIRET generator for Yvelines used for?
Developers and QA teams often need realistic test data that resembles real French companies. A department-specific SIRET generator allows you to:
- Test forms that validate SIRET format and postal address
- Populate demo databases with fictional companies geolocated in Yvelines
- Simulate business scenarios involving companies from the Île-de-France region
- Train teams without using real data from existing companies
All generated SIRETs are algorithmically valid (verified Luhn key) but do not correspond to any company registered in the INSEE SIRENE registry.
FAQ
Use our generator above to get fake SIRET numbers with addresses located in the Yvelines department (code 78). SIRETs are generated according to the Luhn standard, accompanied by the corresponding SIREN, company name and a real postal address in the Île-de-France region.
Yes, using fake SIRET numbers is perfectly legal in a testing, software development, training or demonstration context. It is important to never use these numbers for real commercial transactions or administrative declarations, which would constitute fraud.
A SIRET number consists of 14 digits: the first 9 form the SIREN number (unique identifier of the company), and the last 5 constitute the NIC (Internal Classification Number), which identifies the establishment within the company. The last digit of the SIRET is a control key calculated using the Luhn algorithm.
Yes, the generated SIRET numbers are algorithmically valid (correct Luhn key) and can be used to test forms, APIs or databases that validate the SIRET format. However, they do not correspond to any real company in the INSEE SIRENE register.
The SIREN (9 digits) identifies a company as a legal entity. The SIRET (14 digits) identifies a particular establishment of that company — a physical address. The same company can have multiple SIRETs (head office + branches), but only one SIREN.
Other departments in Île-de-France
Yvelines is part of the Île-de-France region. Generate fake SIRETs for neighbouring departments too:
Need more SIRET numbers or a CSV export?
Our main generator lets you create up to 1000 entries and export to CSV.