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INSEE code

INSEE code is a mathematics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand INSEE code rather than just read about it. In short: The INSEE code ( in-SAY) is a numerical indexing code used by the French National Institute for Statistics and Economic Studies (INSEE) to identify various entities, including communes and départements. They are also used as national identification numbers given to people.

INSEE code — main illustration
INSEE code — illustration

Key takeaways

  • INSEE code belongs to mathematics; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect INSEE code to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of INSEE code from memory before moving on to harder problems.

Reference excerpt

The INSEE code ( in-SAY) is a numerical indexing code used by the French National Institute for Statistics and Economic Studies (INSEE) to identify various entities, including communes and départements. They are also used as national identification numbers given to people.

Created under Vichy Although today this national identification number is used by social security in France and is present on each person's social security card (carte Vitale), it was originally created under Vichy France under the guise of the Registration Number to the National Directory of Identification of Physical People (Numéro d'inscription au répertoire des personnes physiques, NIRPP or simply NIR). The latter was originally to be used as a clandestine military recruitment tool, but in the end served to identify Jews, gypsies, and other "undesirable" populations under Vichy's conceptions. The first digit of the NIR was 1 for a male European, 2 for a female European, 3 for a male Muslim, 4 for a female Muslim, 5 for a male Jew, 6 for a female Jew, 7 for a male foreigner, 8 for a female foreigner, while 9 and 0 were reserved for persons of undetermined racial status. The Demographic Service was created in 1940 in order to replace the military recruitment office prohibited by the June 1940 Armistice with Nazi Germany. On October 11, 1941, the Demographic Service absorbed the former General Statistics of France (SGF, created in 1833). The new organization was called the National Statistical Service (Service national des statistiques, SNS).

National identification numbers Each French person receives at birth a national identification number, the "numéro d'inscription au répertoire" (NIR or National Repertory registration), also called a "numéro de sécurité sociale" (or Social Security number). This INSEE number is composed of 13 digits + a two-digit key. Although the total number is of 15 digits, its composition makes it easy for individuals to remember at least the first seven digits (they just have to know their sex, year and month of birth, and department of birth). Their format is as follows: syymmlloookkk cc, where

s is 1 for a male, 2 for a female, yy are the last two digits of the year of birth, mm is the month of birth, usually 01 to 12 (but there are special values for persons whose exact date of birth is not known), ll is the number of the department of origin : 2 digits, or 1 digit and 1 letter in metropolitan France, 3 digits for overseas. ooo is the commune of origin (a department is composed of various communes) : 3 digits in metropolitan France or 2 digits for overseas. kkk is an order number to distinguish people being born at the same place in the same year and month. This number is the one given by the Acte de naissance, an official paper which officialize a birth (and is needed throughout life for various administrative procedures, such as getting an identity card). 'cc' is the "control key", 01 to 97, equal to 97-(the rest of the number modulo 97).There are exceptions for people in particular situations. The "sex" codes (s: 1 for male, 2 for female) can be given in special occasions for temporary registrations, such as for someone who a person who works as a wage-earner but is not registered for miscellaneous reasons. The sex code can be changed if someone underwent gender reassignment. Under Vichy France, but only in Algeria (not in metropolitan France) this s code was also used to register Jews, Algerian Muslims, foreigners, or ill-defined people. Thus, 3 or 4 was given to Muslim people of Algeria and of all colonies; 5 or 6 for indigenous Jews; 7 or 8 for foreigners; 9 or 0 for miscellaneous and ill-defined status (people in none of these classes). The part llooo is used together, referred to as the COG, which identifies the person's location of birth. They are also specific codes for people whose date or place of birth is unknown, although this is today more and more rare (for example, the birth code is greater than 20 if the month of birth is unknown, and the communal code is 990 if the commune of origin is unknown). For overseas departments, the department number has three digits, and the communal number two digits (since 1950). People born abroad have a departmental code of 99, and the communal code is replaced by the code of the country of birth, which has three digits. Before 1964, departmental codes from 91 to 96 were used for Algeria, Tunisia and Morocco. If in a specified month the total number of births exceeds 999, an extension common code is created. The last code is obtained by a mathematical method (dividing by 97 the number formed by the first 13 digits, taking the remainder from this division, and then the "complement to 97", that is the difference between 97 and this remainder): this gives the control key code.

History The NIR (National Identification Repertory) was created by René Carmille, who died at the Dachau concentration camp in 1944. Between April and August 1941, under the Vichy regime, Carmille conducted the first general survey to prepare the secret mobilisation of a French army. The codification was then done by General Marie in Algeria, to obtain a census of Jews, Muslims and other categories. The aim was to create a file of the whole of the French population and to discriminate according to ethnic or statutory criteria, following the racial policies of Vichy. Thus, the first digit that is now used to distinguish males and females then had other purposes: 3 or 4 for Algerian non-Jewish indigenous people, 5 or 6 for indigenous Jews, 7 or 8 for foreigners, and 9 or 0 for miscellaneous and ill-defined statutes. This discriminatory categorization used in Algeria was abolished in 1944 and has never been used in Metropolitan France where, throughout the war, only "1" and "2" (for male and female) was used. The administration of the NIR was assigned in 1946 to the new Statistical Institute, the INSEE. This institution is also in charge of the RNIPP (répertoire national d'identification des personnes physiques, National Repertory of Identification of Physical Persons), which contains for each individual: the NIR, last name, first name, sex, date and place of birth, and a reference of the Birth Registration (Acte de naissance).

SIREN and SIRET codes SIREN codes are given to businesses and nonprofit associations, SIRET codes to their establishments and facilities (SIRENE database).

Geographical codes

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with INSEE code

Start with the simplest possible case. Write down what INSEE code claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In mathematics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to INSEE code before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about INSEE code ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of INSEE code

In research
INSEE code appears in mathematics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses INSEE code in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
INSEE code is common in secondary-school and first-year university syllabi. It links to neighbouring topics Geography of France, Institut national de la statistique et des études économiques, Statistical data coding, so understanding it makes those chapters shorter.
In everyday life
Look for INSEE code outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study INSEE code in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what INSEE code means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain INSEE code out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is INSEE code in simple terms?

The INSEE code ( in-SAY) is a numerical indexing code used by the French National Institute for Statistics and Economic Studies (INSEE) to identify various entities, including communes and départements. They are also used as national identification numbers given to people.

Why does INSEE code matter?

Because it connects several mathematics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study INSEE code?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on INSEE code.

Tags

  • Geography of France
  • Institut national de la statistique et des études économiques
  • Statistical data coding

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