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A country code is a short alphanumeric identification code for countries and dependent areas. Its primary use is in data processing and communications. Several identification systems have been developed.
E.164 is an international standard, titled The international public telecommunication numbering plan, that defines a numbering plan for the worldwide public switched telephone network (PSTN) and some other data networks.
The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1. Some North American countries, most notably Mexico, do not participate with the NANP.
Telephone number mapping is a system of unifying the international telephone number system of the public switched telephone network with the Internet addressing and identification name spaces. Internationally, telephone numbers are systematically organized by the E.164 standard, while the Internet uses the Domain Name System (DNS) for linking domain names to IP addresses and other resource information. Telephone number mapping systems provide facilities to determine applicable Internet communications servers responsible for servicing a given telephone number using DNS queries.
A toll-free telephone number or freephone number is a telephone number that is billed for all arriving calls. For the calling party, a call to a toll-free number from a landline is free of charge. A toll-free number is identified by a dialing prefix similar to an area code. The specific service access varies by country.
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 the administrative regions of the public switched telephone network (PSTN) and in private telephone networks.
With the intent of forming a trans-Europe numbering plan as an option for anyone needing multi-national European telephone presence, the ITU allocated country calling code +388 as a subdivided, catch-all container for such services. This was designated the European Telephony Numbering Space or ETNS.
The Global Mobile Satellite System (GMSS) consists of several satellite phone providers serving private customers. It can be compared to PLMN (wireless telephony carriers) and PSTN (traditional wire-based telephony).
Universal personal telecommunications (UPT) was a special segment of the international telephone number space which had been set aside for universal personal telephone numbers. This service had been allocated country code +87810 and was completed by a 10-digit subscriber number which provided 10 billion unique numbers. The International Telecommunication Union (ITU) introduced this concept in 2001, referring to it as "global number portability".
Telephone numbers in Italy are managed by the Autorità per le Garanzie nelle Comunicazioni (AGCOM), a national regulatory authority for the communication industry located in Rome.
In Sweden, the area codes are, including the leading 0, two, three or four digits long, with larger towns and cities having shorter area codes permitting a larger number of telephone numbers in the eight to ten digits used. Before the 1990s, ten-digit numbers were very rare, but they have become increasingly common because of the deregulation of telecommunications, the new 112 emergency number, and the creation of a single area code for the Greater Stockholm area. No subscriber number is shorter than five digits. The longest subscriber numbers have eight digits.
Telephone numbers in the Republic of China (Taiwan) use a system of area codes, beginning 02 to 08. The leading digit(s) following the area code denote the network operator (Chunghwa Telecom and its competitors). Mobile numbers begin 09. The international code for calls into Taiwan is 886.
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.
Thailand's telephone numbering plan in Thailand is managed by the National Broadcasting and Telecommunications Commission (NBTC) in accordance with International Telecommunication Union's (ITU) recommendation E.164.
Telephone numbers in Canada follow the fixed-length format of the North American Numbering Plan (NANP) of a three-digit area code, a three-digit central office code, and a four-digit station or line code. This is represented as NPA NXX XXXX.
Telephone numbers in Russia are administered by Roskomnadzor, and Ministry of Digital Development, Communications and Mass Communications of the Russian Federation. Russia's National Numbering Plan (NNP) is a four-level telephone numbering plan with local, zone, country, and international scopes, implementing a closed numbering plan, in which the number of digits of all national significant numbers (NSN) assigned to subscriber telephones is fixed at ten, with three digits for the area code, and a seven-digit subscriber number which includes a zone code of up to two digits. Internationally, Russia participates in the numbering plans of the International Telecommunication Union (ITU) provided by recommendations E.164 and E.123, using the telephone country code 7.
A telephone number is a sequence of digits assigned to a landline telephone subscriber station connected to a telephone line or to a wireless electronic telephony device, such as a radio telephone or a mobile telephone, or to other devices for data transmission via the public switched telephone network (PSTN) or other public and private networks.
The iNum initiative was a project by Voxbone to create a global dial code for Voice over IP communications. Voxbone is a Belgian company specializing in wholesale telephone numbers for VoIP applications. The International Telecommunication Union (ITU) allocated a portion of the non-geographic "country code" +883 to this initiative. Specifically, iNums were telephone numbers in the format +883 5100 xxxxxxxx.
References
- ↑ "BT Price List". BT. Retrieved 30 January 2017.
- ↑ www.mcp.com Archived 2018-08-30 at the Wayback Machine .
- ↑ www.oration.gr/index-en.html Archived 2006-07-12 at the Wayback Machine .
- ↑ www.gni.ch Archived 2005-07-23 at the Wayback Machine .
- ↑ "iNum Initiative". Archived from the original on 2019-01-25.
{{cite web}}: CS1 maint: unfit URL (link) - ↑ Voxbone decommissions iNum, DSLReports, 2 June 2020.
- ↑ ITU official website
- ↑ MCN Telecom official website
- ↑ "About E164.org". Archived from the original on 2010-09-20.
{{cite web}}: CS1 maint: unfit URL (link). - ↑ www.seanet.se.