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What are the identification numbers of a company?

Verified 01 January 2023 - Directorate for Legal and Administrative Information (Prime Minister)

Are you lost among the numbers that identify your company?

We explain how to find you and how therecognise.

You must provide these numbers when you steps and put them on your administrative documents.

Tableau - Company identification numbers





Unique identification of your company, its identity card

Must be provided in all steps

9 digits


Identification of each establishment of the same company where the activity is carried out

With geographical indication of the activity/building

Must be on pay slips

14 digits = 9 digits of the SIREN + 5 digits specific to each establishment

APE Code (or NAF Code))

Identification of the branch of activity of your main activity for each establishment

Determines the collective agreement that applies to your employees

Must be on pay slips

4 digits + 1 letter

CBN (Trade and businesses Register)

Certificate of Registration if you are a merchant asISIS: titleContent or as a commercial business

RCS + city of registry + SIREN

LEILegal Entity Identifier or Legal Entity Identifier)

Identification of businesses involved in financial markets

20-character letter and number sequence

Intra Community VAT

Tax identification if you pay VAT

Must appear on invoices and VAT returns

EN (country code)+ 2 digits + SIREN

You receive your company's identification numbers following your registration.

You have no requests to be done for receive.

Their assignment shall automatic.

You will find them in your personal space of Company formalities window on which you must complete your activity report.

Company formalities window

For any questions about assigning your identification numbers and codes, you can contact Inpi.

This data public.

Anyone can find or find the Siren or Siret number of a company if necessary. The legal and financial characteristics of the companies are accessible to all. You can view them either on the companies Directory, or on the Insee website in its Sirene directory.

Company Directory

TheCompany Directory allows:

  • Find the Siret or Siren number your company
  • Find company info other than yours (legal, financial)

Example :

You will find in particular the intra-Community VAT number, the APE code, the Siret of all companies registered in France and all publications at Bodacc: titleContent

Company Directory: Find all company information

You can search by name, by number of Siret or by number of Siren.

Sirene Directory

You can also consult the Sirene directory and request a company's "identity card":

Sirene Directory Situation Notice


You can use the MyIdenum online service to enable your company's digital identity.

This service is linked to the Commercial and business Register (CHN).

MyIdenum: The recognised digital identity to access your online services

Who can help me?

Find who can answer your questions in your region

To small and medium-sized and micro-entreprises, do you have a business project, a difficulty or a question ?

Quick and simple public service: you will be contacted over the phone by one of our experts.

Speak with an advisor on Place des Entreprises