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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.
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.
The French telephone numbering plan is used in Metropolitan France, French overseas departments and some overseas collectivities.
E.123 is an international standard by the Telecommunication Standardization Sector of the International Telecommunication Union (ITU-T), entitled Notation for national and international telephone numbers, e-mail addresses and Web addresses. It provides guidelines for the presentation of telephone numbers, email addresses, and web addresses in print, on letterheads, and similar purposes.
International direct dialing (IDD) or international subscriber dialling (ISD) is placing an international telephone call, dialed directly by a telephone subscriber, rather than by a telephone operator. Subscriber dialing of international calls typically requires an international call prefix to be dialed before the country code.
The area code 868 is assigned to Trinidad and Tobago, a member of the North American Numbering Plan (NANP). The telephone numbering plan for the country is known as the National Numbering Plan. It is part of a system used for assigning telephone numbers in Trinidad and Tobago, and functions as a part of the North American Numbering Plan (NANP). It is regulated by the Telecommunications Authority of Trinidad and Tobago, which holds responsibility for telecommunications in the country.
In telecommunication, a dial plan establishes the permitted sequences of digits dialed by telephone subscriber and the manner in which a telephone switch interprets these digits within the definitions of the prevailing telephone numbering plan. Dial plans in the public switched telephone network referred to as dialing procedures.
Area code 246 is the telephone area code in the North American Numbering Plan (NANP) for Barbados. The sequence 246 spells BIM on an alpha-numeric telephone keypad, a nickname for the island.
Telephone numbers in Azerbaijan follow the ITU Telecommunication Standardization Sector E.164 recommended format its telephone numbering plan.
Telephone numbers in Europe are managed by the national telecommunications authorities of each country. Most country codes start with 3 and 4, but some countries that by the Copenhagen criteria are considered part of Europe have country codes starting on numbers most common outside of Europe.
Lithuania uses an open telephone numbering plan with all phone numbers having nine digits, including the prefix "0", a 1–3 digit area code, and a 5–7 digit subscriber telephone number.
The following are the telephone codes in Zimbabwe.
Telephone numbers in San Marino have six to ten digits. Numbers starting with either 0, 8 or 9 are assigned to landlines, 6 is used for mobile services, 5 for IP telephony services and 7 for premium numbers. No trunk prefixes are used: all the digits are always dialed.
The following are the telephone codes in Comoros.
The Gibraltar telephone numbering plan is the system used for assigning telephone numbers in the British Overseas Territory of Gibraltar. It is regulated by the Gibraltar Regulatory Authority (GRA), which holds responsibility for telecommunications.
Telephone numbers in Abkhazia follow the dialling plan in place in Russia.
References
- ↑ "Telephone numbering plan" (PDF). International Telecommunication Union (ITU). 2018-06-12. Retrieved 2023-08-27.