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A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, reachable by a system of destination code routing. Telephone numbering plans are defined in each of administrative regions of the public switched telephone network (PSTN) and they are also present in private telephone networks. For public number systems, geographic location plays a role in the sequence of numbers assigned to each telephone subscriber.
Telephone numbers in the United Kingdom are administered by the UK government's Office of Communications (Ofcom). For this purpose, Ofcom established a telephone numbering plan, known as the National Telephone Numbering Plan, which is the system for assigning telephone numbers to subscriber stations.
The Australian telephone numbering plan describes the allocation of phone numbers in Australia. It has changed many times, the most recent major reorganisation by the Australian Communications and Media Authority taking place between 1994 and 1998.
The French telephone numbering plan is not only used for metropolitan France but also for the French overseas departments and some overseas collectivities.
Telephone numbers in the Netherlands are administered by the Ministry of Economic Affairs, Agriculture and Innovation of the Netherlands and may be grouped into three general categories: geographical numbers, non-geographical numbers, and numbers for public services.
Telephone numbers in China are organized according to the Chinese Telephone Code Plan. The numerical formats of landlines and mobile phones are different: landlines have area-codes, whereas mobile phones do not. In major cities, landline-numbers consist of a two-digit area code followed by an eight-digit inner-number. In other places, landline-numbers consist of a three-digit area code followed by a seven- or eight-digit inner-number. The numbers of mobile phones consist of eleven digits.
Telephone numbers in Hong Kong are mostly eight-digit. Fixed land line numbers start with 2 or 3, mobile (cellular) phone numbers with 5, 6, 7 or 9, pager numbers with 7 and forwarding service with 8. Since the end of 1989, there have been no area codes within Hong Kong.
South Africa switched to a closed numbering system effective 16 January 2007. At that time, it became mandatory to dial the full 10-digit telephone number, including the zero in the three-digit area code, for local calls. Area codes within the system are generally organized geographically. All telephone numbers are 9 digits long, except for certain Telkom special services. When dialed from another country, the '0' is omitted and replaced with the appropriate international access code and the country code 27.
Telephone numbers in Singapore, also known as the National Numbering Plan, are regulated by the Info-communications Media Development Authority (IMDA). Due to the small geographical size of Singapore, there are no area or trunk codes; all numbers belong to one numbering area, and thus come in the same 8-digit format. Numbers are categorised based on the first digit, thus providing ten possible categories, of which six are currently in use and the remaining four reserved for future usage.
Telephone numbers in Switzerland are defined and assigned according to the Swiss telephone numbering plan administered by the Swiss Federal Office of Communications. The plan has been changed several times and the most recent reorganization was implemented in March 2002.
Telephone numbers in Malaysia are regulated by the Malaysian Communications and Multimedia Commission (MCMC).
PhONEday was a change to the telephone dialling plan in the United Kingdom on 16 April 1995. It changed geographic area codes and some telephone numbers. In most areas, a "1" was added to the dialling code after the initial zero. In Bristol, Leeds, Leicester, Nottingham and Sheffield, the area codes were replaced with new codes and the subscriber numbers gained an extra digit. The PhONEday changes also made provision for new ranges of subscriber numbers in those five cities. A £16m advertising campaign, and an eight-month period of parallel running during which old and new codes were active, preceded the change. PhONEday followed a change made in May 1990, when the old London area code 01 had been released from use, permitting all United Kingdom geographic numbers to begin with this prefix. Originally planned in 1991 to take place in 1994, in 1992 the change was postponed until 1995.
Until September 1999, East Timor formed part of the Indonesian numbering plan, using the country code +62, followed by area codes for the two largest cities, Dili (390) and Baucau (399). Following the violence in the wake of Indonesia's departure from the territory, most of the telecommunications infrastructure was destroyed, and Telkom Indonesia withdrew its services from East Timor.
The regulation of telephone numbers in Germany is the responsibility of the Federal Network Agency of the German government. The agency has a mandate to telecommunications in Germany and other infrastructure systems.
Telephone numbers in India are administered under the National Numbering Plan of 2003 by the Department of Telecommunications of the Government of India. The numbering plan was last updated in 2015. The country code "91" was assigned to India by the International Telecommunication Union in the 1960s.
Fixed line numbers in Botswana are seven digits long in a closed telephone numbering plan, with the geographical area being indicated by the first two or three digits, meaning that there are no area codes. The country was allocated its own country code by the International Telecommunication Union, +267, in the late 1960s.
The national conventions for writing telephone numbers vary by country. While international standards exist in the form of the International Telecommunication Union sector ITU-T issued recommendation E.123, national telephone numbering plans define the format and length of telephone numbers assigned to telephones.
Namibia's telephone numbering plan was originally devised when the country, then known as South West Africa, was under South African administration, and integrated into the South African telephone numbering plan.
The following are the telephone numbers in Lesotho. Lesotho was allocated the country code +266 by the International Telecommunication Union in the late 1960s. Phone numbers in are eight digits long, the first two digits being the area code. Previously, Lesotho had area codes, which were integrated into the South African telephone numbering plan, and calls could be made from South Africa using the regional code 050. For example, to call a number in Maseru, subscribers would dial 0501, while to call a number in Mazenod, they would dial 05022. From the rest of the world, subscribers would dial +266 1.
The Belize telephone numbering plan is the system used for assigning telephone numbers in Belize.
References
- ↑ White Book, Volume 2, Part 1, International Telegraph and Telephone Consultative Committee, International Telecommunication Union, 1969, page 29
- ↑ International Numbering Resources: National Numbering Plans: Eswatini, ITU-T
- ↑ EPTC eight-digit numbers launched next month, Fanyana Mabuza, The Swazi Observer , January 4, 2011
- ↑ "Eswantini 2010 expansion". www.wtng.info.
- ↑ Pretoria Telephone Directory, Department of Posts and Telecommunications, 1991, page 21
- ↑ Swaziland Telephone Directory, Department of Posts and Telecommunications, 1986, page A-8
- ↑ Swaziland Telephone Directory, Department of Posts and Telecommunications, 1990, page c
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