mathematics

Telephone numbers in France

Telephone numbers in France 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 Telephone numbers in France rather than just read about it. In short: The French telephone numbering plan is used in Metropolitan France, French overseas departments and some overseas collectivities. Since 1996, Metropolitan France uses a ten-digit closed numbering plan, where the first two digits denote a geographic area, mobile or non-geographic number. 01 Île-de-France 02 Northwest France 03 Northeast France 04 Southeast France 05 Southwest France 06 Mobile phone services 07 Mobile…

Key takeaways

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

Reference excerpt

The French telephone numbering plan is used in Metropolitan France, French overseas departments and some overseas collectivities. Since 1996, Metropolitan France uses a ten-digit closed numbering plan, where the first two digits denote a geographic area, mobile or non-geographic number.

01 Île-de-France 02 Northwest France 03 Northeast France 04 Southeast France 05 Southwest France 06 Mobile phone services 07 Mobile phone services 08 Special phone numbers: Freephone (numéro vert) and shared-cost services 09 Non-geographic number (used by voice over IP services) All geographic numbers are dialed in the ten-digit format, even for local calls. The international access code is the International Telecommunication Union's recommended 00. When calling France from abroad, the leading zero should be omitted: for example, to call a number in Southwest France, one would dial +33 5 xx xx xx xx. Telephone numbers are usually stated as a sequence of five digit-pairs, e.g., 0x xx xx xx xx–and not, for example, 0 xxx-xxx-xxx or others. Overseas departments and collectivities have distinct country codes and different digit grouping formats.

Overseas departments and territories The French overseas departments (départements d'outre mer or DOM) have separate country codes from metropolitan France, with Réunion being assigned the code 262 while Guadeloupe, French Guiana and Martinique were assigned the codes 590, 594 and 596 respectively. Until 1996, the use of the international access code 19 and country code was required for calls from metropolitan France. For example, to call Guadeloupe from metropolitan France, a subscriber would dial 19 590 xxx xxx, 590 being the country code. This included the islands of Saint Barthelemy and Saint Martin, which later separated from Guadeloupe to become collectivities, although they still use the same country code. By contrast, calls to metropolitan France from the overseas departments only required the use of the trunk code 16. However, under the new present French numbering plan, direct dialing was introduced for calls between the DOMs (including collectivités territoriales) and metropolitan France, requiring only the '0' to be dialed, with the country code being used as a geographical area code. Despite this, the 33 country code was not adopted for calls to the DOMs from the rest of the world, because of technical difficulties with operators in neighbouring countries. For example, calls to Réunion from Mauritius would have to be routed via metropolitan France, adversely affecting voice quality as well as increasing call costs. In 2001, telephone numbers in the DOMs changed to the same ten-digit format as metropolitan France, with new prefixes beginning with the digit '6' being adopted for mobile phone services:

Guadeloupe, Saint-Barthélemy and Saint-Martin From France:

Fixed phone line: 0 590 xx xx xx Mobile phone line: 0 690 xx xx xx or 0 691 xx xx xx Outside France:

Fixed phone line: +590 590 xx xx xx Mobile phone line: +590 690 xx xx xx or +590 691 xx xx xx

French Guiana From France:

Fixed phone line: 0 594 xx xx xx Mobile phone line: 0 694 xx xx xx Outside France:

Fixed phone line: +594 594 xx xx xx Mobile phone line: +594 694 xx xx xx

Martinique From France:

Fixed phone line: 0 596 xx xx xx Mobile phone line: 0 696 xx xx xx or 0 697 xx xx xx Outside France:

Fixed phone line: +596 596 xx xx xx Mobile phone line: +596 696 xx xx xx or +596 697 xx xx xx

Réunion From France:

Fixed phone line: 0 262 xx xx xx or 0 263 xx xx xx Mobile phone line: 0 692 xx xx xx or 0 693 xx xx xx Outside France:

Fixed phone line: +262 262 xx xx xx or +262 263 xx xx xx Mobile phone line: +262 692 xx xx xx or +262 693 xx xx xx

Others Before 30 March 2007 the collectivité départementale of Mayotte used country code 269, shared with the Comoros:

From France, including Mayotte: 0 269 xx xx xx From Comoros: xx xx xx Outside France and Comoros: +269 xx xx xx On 30 March 2007 Mayotte adopted country code 262, used by Réunion, and a new numbering range was introduced for mobile phones:

From France: Fixed phone line: 0 269 xx xx xx Mobile phone line: 0 639 xx xx xx Outside France: Fixed phone line: +262 269 xx xx xx Mobile phone line: +262 639 xx xx xx Calls to Saint Pierre and Miquelon require only '0', telephone country code and the subscriber's six-digit number, e.g.:

From France: 0 508 xx xx xx Outside France: +508 xx xx xx Calls to and from the territoires d'outre mer, however, require full international dialing, hence the international access code and country code must be used:

Paris from New Caledonia: 00 33 1 xx xx xx xx New Caledonia from Paris: 00 687 xx xx xx

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Telephone numbers in France

Start with the simplest possible case. Write down what Telephone numbers in France 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 Telephone numbers in France 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 Telephone numbers in France 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 Telephone numbers in France

In research: Telephone numbers in France 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 Telephone numbers in France 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: Telephone numbers in France is common in secondary-school and first-year university syllabi. It links to neighbouring topics France communications-related lists, Telecommunications in France, Telephone numbers by country, so understanding it makes those chapters shorter.
In everyday life: Look for Telephone numbers in France 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 Telephone numbers in France in 20 minutes

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

Frequently asked questions

What is Telephone numbers in France in simple terms?

Why does Telephone numbers in France 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 Telephone numbers in France?

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 Telephone numbers in France.