Computing French Social Security Key Code, checking and decoding

French Social Security number (also called NIR or INSEE number) has 13 digits plus 2 control key digits.
It is written on Vitale Card, it is written on pay slips and it used for pension or health insurance.

This form checks structure of Social Security Number, it computes or check social security number to avoid some mistakes.

All computations are done automatically when you enter a value

This sofware also decode social security number to display birth location (town, canton, borough, department, region, country)from a database with more than 40 000 geographical codes coming from INSEE.

Try with example of
Now, and try yourself to enter a social security number on line with yellow background.

For example, to check a social security number with 15 digits, enter it the field on the right of the line with yellow background.

To decode a social security number with 13 digits, enter it the field on the left of the line with yellow background.

To decode a social security number with 15 digits, enter it the field on the right of the line with yellow background.

To generate a social security number, enter the informations in the fields on the middle of the line with yellow background.

To search which town or country is related a geographical code, enter department code and Insee town code on line with yellow background.

Structure	Short number	Sex	Birth year	Birth month	Birth Department	Birth town	Order number	Control key	Long social security number
Format	13 digits	1 digit 1 = man 2= female 8= temporary number	2 digits last 2 digits of the year ie: 1980 ->80	on 2 digits january = 01 december=12 20 and above : incomplete birth certificate	on 2 digits or letters: 75 : Paris 99 : foreign country 2A : South Corsica 2B : North Corsica France overseas : department on 3 digits (1 on following field)	on 3 digits (2 for overseas) Insee code of the town 990 to 999 : ward of the state or unknown birth place	3 digits 001 for the firth birth of the month on town registry	2 digits	15 digits (13 digits + 2 digits of control key)
Exemple: Décodage :	2 87 05 35 238 001	2	87	05	35	238	001	47	2 87 05 35 238 001 47
Exemple: Décodage :		Female	1987	May	Ille et Vilaine	Rennes	Ok	Correct
Yours :
Decoding :

Compute this person's life expectancy
Compute this person's body mass index

Note

This tool computes control key of a French Social Security Number (last 2 digits) and checks that the number is properly formatted. It decodes it and extract sex, birth month and year, birth location (town, Borough, canton, department, Region, country, associated zip codes).
Example of a number (female born in Rennes in May 1987).
Use décodeur avancé de numéro de sécurité sociale pour plus d'explications et les conditions d'utilisation.
Entered Social Security Number is not sent to us, so we don't know it. Only 5 digits geographical code is sent to our server to retrieve associated birth town, no personal data is used.
French Social Security Number (also known as NIR) written on Vitale card is issued by INSEE from birth certificate.
From the age of 16, Seocial Security send Vitale card with the Social Security number.
French Social Security number has 13 digits plus 2 control key digits (computed using div modulo 97).

See also :
Copyright © 2000-2025 Laurent Pelé
Use of this software is limited to educational purpose and abuse uses will be prosecuted according to article L 335-3 alinea 2 of code de la propriété intellectuelle.

Computing French Social Security Key Code, checking and decoding

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