Telephone numbering plan

A telephone area code is a sequence of numbers that you type when dialing a phone number to switch the logical place.

A prefix consists of the access code ( VAZ ) and the area code, ( ONKZ ).

This logical location corresponds with calls to landlines usually a geographic location, a corresponding code in the national numbering space is denoted by area code ( ONKZ ), corresponding subscriber numbers are so-called geographic numbers.

It may be at the logical place but also to a non-geographic number range ( in Germany, the telephone area code 032 ) to a standalone telephone network ( for example mobile telephone codes ) to provide a service (eg service numbers ) or a so-called "savings code " for the Call- by-call method of using a particular network operator act.

  • 4.1 International dialing codes, country codes
  • 4.2 National primaries, numbering plans 4.2.1 German language area
  • 4.2.2 Other ( selection)

General information on the history and necessity

Historically developed area code, because the phone networks were always designed only for localized places. But as soon as two telephone networks have an at least partially overlapping numbering space, phone numbers are no longer unique. Often they are also used for routing (selection of the telephone network of a particular company ) a call. Since 1964 the international dialing codes are standardized by the International Telecommunication Union ( ITU).

Since then, there is a telephone area code in many countries from a access code and the actual code number. If you want to have a conversation to Berlin, for example, within the German telephone network, just select the digits " 030 ". The zero is the access code, "30" the ID for Berlin. For more information about the exact procedure see exchange.

For international dialing codes, there is a different access code or ( as an extension of the hierarchy ) other digits. In most countries this is "00"; the first digit then carries the meaning "from the local level also ," " raise the national level " is the second. In order to record the resulting number combinations regional uniform, this is also a " " is written, which is also used in mobile networks so.

The situation of the telephone area codes in the IP telephony is more complicated and described there.

Code types

There are different types of primaries:

  • The international telephone prefix to choose the destination country, for example: 41 Switzerland
  • 423 Liechtenstein
  • 43 Austria
  • Germany 49

Countries with mandatory use of the area code in all cases

In France, Portugal (1999 ), Denmark, Norway, Italy, Belgium (July 2000), Switzerland (March 2002), the Czech Republic (22 September 2002), in Greece, Poland (5 December 2005 ), Spain and Estonia was the mandatory use of the area code introduced, even if it's only a local call. An advantage of the method is that in this way per local network 11 % more numbers are available because the access code (usually this is the 0) can also be used directly after the area code. Furthermore, numbers that do not begin with the access code, are used for special services and mobile telephony. Such a provision is also provided to enable number portability to any subscriber number also when moving beyond the local network boundaries, which was implemented for example in Switzerland, Estonia, the Czech Republic and Luxembourg ( to 032 numbers in Germany ).

Number portability

The implementation of the European Universal Service Directive in 2002 and other efforts to number porting or porting (for mobile phones: Mobile Number Portability, MNP) restricts the code in its function of routing, because the destination network no longer fixed. This is a problem which should find the cheapest way to target particular for Least Cost Router.

In Germany must present a so-called location-based phone number ( a number with an area code, practically all ordinary numbers in the fixed network) will be allocated only to participants who are resident in the territory actually this number. Therefore, in Germany the porting of location-based phone numbers only within the territory of the area code is possible. However, this port must be enabled when changing the provider ( § 46 TKG).

Lists

International dialing codes, country codes

  • Country code list sorted by numbers
  • Country Code List sorted by countries

National primaries, numbering plans

German -speaking

  • Telephone area codes in Switzerland
  • Telephone area codes in Austria
  • Telephone area codes in Germany

Other ( selection)

  • North American Numbering Plan for USA, Canada, many Caribbean countries
  • Democratic Republic of Congo
  • Namibia
  • Netherlands
  • France
  • Italy
  • Portugal
  • Albania
  • Croatia
  • Romania
  • United Kingdom

Special primaries

In addition, there are places with multiple area codes. Example is the community Biisingen, a German enclave in the canton of Schaffhausen in Switzerland.

There are also two different zip codes.

Interexchange carrier Telephone numbers in the Democratic Republic of the Congo Telephone numbers in the Netherlands List of dialling codes in Italy Telephone numbers in Portugal Telephone numbers in Albania Telephone numbers in Croatia
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