mathematics

Telephone numbers in Spain

Telephone numbers in Spain 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 Spain rather than just read about it. In short: The Spanish telephone numbering plan is the allocation of telephone numbers in Spain. It was previously regulated by the Comisión del Mercado de las Telecomunicaciones (CMT), but is now regulated by the Comisión Nacional de los Mercados y la Competencia (CNMC).

Key takeaways

Telephone numbers in Spain 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 Spain to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Telephone numbers in Spain from memory before moving on to harder problems.

Reference excerpt

The Spanish telephone numbering plan is the allocation of telephone numbers in Spain. It was previously regulated by the Comisión del Mercado de las Telecomunicaciones (CMT), but is now regulated by the Comisión Nacional de los Mercados y la Competencia (CNMC).

History Before 1998, local telephone calls could be made using only the subscriber's number without the area code, while the trunk code '9' was omitted when calling from outside Spain, e.g.:

xx[x] xx xx (within the same province) 9xx xxx xxx (within Spain) +34 xx xxx xxx (outside Spain)

International calls were made by dialling the international access code 07, waiting for a tone, and then dialling the country code. However, calls to Gibraltar were made using the prefix '956' for the province of Cádiz, followed by the digit '7', instead of the country code +350, e.g.:

7 xx xxx (from Cádiz) 956 7 xx xxx (from the rest of Spain)

Similarly, calls to Andorra were made using the prefix '973' for the province of Lleida followed by the digit '8', e.g.:

8 xx xxx (from Lleida) 9738 xx xxx (from Spain)

It was also possible to call Andorra from other countries via Spain using the prefix +34 738 instead of via France using the prefix +33 628. However, on 17 December 1994, Andorra adopted its own country code +376, with '8' being added to the subscriber's five-digit number, meaning that international dialling was required from Spain, e.g.:

9738 xx xxx (before 17 December 1994) 07376 8xx xxx (after 17 December 1994)

Mobile phone numbers began with the prefix '90x' or '9x9', e.g.:

9x9 xxx xxx (within Spain) +34 x9 xxx xxx (outside Spain)

Current numbering plan On 1 December 1998, Spain changed to a new telephone numbering plan. Under the closed numbering plan with the trunk prefix '9' being incorporated into the subscriber's number, so that a nine-digit number was used for all calls, e.g.:

9xx xxx xxx (within Spain) +34 9xx xxx xxx (outside Spain)

Mobiles similarly changed, and were now prefixed with the digit '6':

608 xxx xxx (within Spain before 1998) +34 08 xxx xxx (outside Spain before 1998) +34 608 xxx xxx (since 1998)

New numbering ranges have also since been introduced:

10xx Carrier selection codes 5xx xxx xxx Personal Numbering 7yx xxx xxx (since 2009–2010; note y cannot be 0 (zero) because this is allocated as a personal number, see below) 8xx xxx xxx Geographic expansion 800 xxx xxx Freephone 900 xxx xxx Freephone 80x xxx xxx Shared-cost 90x xxx xxx Shared-cost

Spain's international access code also changed from 07 to 00, but this did not affect dialling arrangements for calls to Gibraltar, with the 9567 prefix being retained. In addition, it was possible to call Gibraltar from other countries via Spain using the prefix +34 9567. However, on 10 February 2007, Spain adopted the international prefix 00350 for all calls to Gibraltar, thereby bringing end to a dispute between Gibraltar and Spain. Consequently, numbers with the prefix 9567 were withdrawn from use, and made available for reassignment to subscribers in Spain.

Mobile phones Mobile phone numbers begin with 6 or 7, followed by 8 digits (6xx xxx xxx or 7yx xxx xxx), where y can be 1 to 9, not 0 (zero). Note, numbers starting with 70 are personal numbers which can be re-directed to any other number by the personal owner. Since the blocks of mobile phone numbers are allocated according to demand from the service providers, there is not necessarily a unique service provider indicated by the three digit numbering group (6xx or 7yx). In October 2009, new legislation was approved to grant the allocation of up to 80,000,000 new numbers beginning with number 7 (followed by 8 digits) to supplement the existing group beginning with number 6 (followed by 8 digits); due to the lack of available numbers to satisfy the increasing demand for mobile phone and other mobile / wireless services.

Personal numbering Personal numbers are used as redirection IDs. The owner of a personal number may request, for example, any call to its personal number to be redirected to any other number it wants. Personal numbers begin with 5, followed by 8 digits.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Telephone numbers in Spain

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

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

Read the reference excerpt below once, without taking notes.
Close the page and write down what Telephone numbers in Spain 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 Spain out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Telephone numbers in Spain in simple terms?

Why does Telephone numbers in Spain 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 Spain?

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 Spain.