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CEFNA

ActiveSIREN number 842 142 275Simplified joint-stock company (SAS)Est. 201871.20 · Technical testing and analysisMontesson, Île-de-France
Official record (Annuaire des entreprises) ↗
Age8 years
older than 43% of its sector
Same activity, France17,042live companies · 9740th oldest
In Montesson1,599live companies · 9 in the same activity
At this address145live companies incl. this one

In brief

CEFNA is a simplified joint-stock company (SAS) registered in France on 1 August 2018. It is 8 years old; 57% of the 17,042 live companies whose main activity is technical testing and analysis are older. Its registered office is in Montesson, Yvelines, Île-de-France, at an address shared with 144 other live companies. 9 live companies in Montesson share the same main activity.

Register details

Registered nameCEFNA
SIREN number842 142 275
Company typeSimplified joint-stock company (SAS)
Registered office5 Rue Du Chant Des Oiseaux, 78360 Montesson
Nature of business (NACE Rev. 2.1 (French NAF 2025))71.20 Technical testing and analysis
International sector (ISIC Rev.4)M · 71 Architectural and engineering activities; technical testing and analysis

Timeline

Register events, newest first.

  • Incorporated

Register entries

From the register.

Incorporated1 August 2018

Technical testing and analysis in France

Live companies whose main activity is 71.20: 17,042 in total, median age 10 years, 1,085 incorporated in the past 12 months.

All 17,042 companies
This company's decadeOther decades
02,0004,0006,0008,0001900s: 261900s1910s: 11910s1920s: 11920s1950s: 81950s1960s: 121960s1970s: 381970s1980s: 3441980s1990s: 1,5671990s2000s: 3,5432000s2010s: 5,0662010s2020s: 6,4362020s
Incorporated per year, still live
05001,0001,5002,0002011: 50020112012: 5122013: 42420132014: 4202015: 47020152016: 5122017: 53620172018: 5052019: 67520192020: 6192021: 77220212022: 9002023: 1,06020232024: 1,0812025: 1,10420252026: 900

Location

Registered office in Montesson, Yvelines, Île-de-France.

Live companies in Montesson1,599
Same activity in Montesson9
Live companies in Yvelines151,787
New in Montesson, past 12 months82

Also registered at this address

144 other live companies share this registered office; shown are those incorporated closest in time to this one.

Similar companies

Live companies with the same main activity, nearest first.

Compare all
D
DIAG-PRO-ACTIONVélizy-Villacoublay, Île-de-France
Number 841 340 193Est. 2018
S
SCTAÉpône, Île-de-France
Number 841 442 510Est. 2018
DM
DIAG M IMMOPoissy, Île-de-France
Number 841 826 431Est. 2018
SC
SOCOTEC CIVIL ENGINEERINGGuyancourt, Île-de-France
Number 843 353 822Est. 2018
CA
CT AUTO LIMAYLimay, Île-de-France
Number 842 179 483Est. 2018
A
AV2DIAGSaint-Germain-en-Laye, Île-de-France
Number 842 796 153Est. 2018

Sources

Register data: Insee, Sirene database of companies and establishments (Licence Ouverte / Open Licence 2.0), delivery of 21 October 2026. Territories: Insee, Code officiel géographique 2026. Industry names: European Union, EU Vocabularies (NACE Rev. 2.1). Context figures are computed by FirmsDB from these sources. This page is not an official register; check the company's entry in the French government business directory before relying on it.