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What are the identification numbers of a company?

Verified 25 August 2022 - Legal and Administrative Information Directorate (Prime Minister)

Extract K or Kbis or D1 replaced by the SIREN number

Published on 29 October 2021

If your company is registered at RCS: titleContent or RM: titleContent, it is no longer necessary to attach an extract K or Kbis or D1 to carry out many administrative procedures.

You just need to communicate your Siren number.

The companies Directory site allows you to obtain all data on each company by providing only its Siren number, its Siret, its name or its business name.

Are you lost among the numbers that identify your company?

We'll explain how you get there. How recognise and what they're for.

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

Company identification numbers





Unique identification of your company, its identity card

Must be provided in all steps

9 digits


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

Geographical identifier 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))

Identify the branch of activity of your primary business 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) on Extract K or KbisSoon Deleted

Certificate of Registration if you are a merchantISIS: titleContent (extract K) or as a commercial business (extract Kbis)

RCS + city of registry + SIREN

RM (Business Directory) on the D1 extract

Certificate of registration if you are a craftsman or a craft business (employing less than 11 employees)

SIREN + RM + numbers indicating the competent chamber of crafts and crafts

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 its registration.

You don't no requests for receive.

Their assignment automatic.

This data is public.

Anyone can find or find the Siren or Siret number of a company. The legal and financial characteristics of companies are accessible to all.

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 ID:

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: 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.

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