Ciekawostka: The international telephone dialing code for Antarctica is 672

Evidence: 67 • authority: 72

Country Code: +672 1x (partial) International Call Prefix: 0011 Trunk Prefix: National Significant Numbers (NSN): six digits (fixed) six digits (mobile) Format: +672 1X XXXX Telephone numbers in the Australian Antarctic Territory use the same country code as Telephone numbers in Norfolk Island.

Evidence: 45 • authority: 72

A telephone country code is a country-specific telephone number prefix for international direct dialing (IDD), a system for reaching telephone service subscribers in foreign areas via international telecommunication networks. Country codes are defined by the International Telecommunication Union (ITU) in ITU-T standards E.123 and E.164. Country codes constitute the international telephone numbering plan. They are used only when dialing a telephone number in a foreign region other than the caller's. They are dialed before the national telephone number. Typically, dialing a foreign telephone number, requires at least one additional prefix, the international call prefix which is an exit code f…

Evidence: 45 • authority: 72

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 (international dial-out code, international direct dial code, IDD code) to be dialed before the country code. The term international subscriber dialling was used in the United Kingdom and Australia until the terminology was changed to international direct dialling. Since the late 20th century, most international calls are dialed directly. Calls are initiated by dialing the international call prefix for t…

Evidence: 45 • authority: 72

International dialing prefixes are used when dialing international telephone calls by telephone users. These prefixes are typically required only when dialling from a landline, while in GSM-compliant mobile phone (cell phone) systems, the symbol + before the destination country code may be used irrespective of the location of the telephone when dialing. The network operator provides the access codes automatically.

Evidence: 45 • authority: 72

A telephone numbering plan is a type of numbering scheme used in a telecommunications network 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 world-wide, as well as within each of the administrative regions of the public switched telephone network (PSTN), and in private telephone networks. In public numbering systems, geographic location typically plays a role in the sequence of numbers assigned to each telephone subscriber. Many numbering plan administrators subdivide their territory of servic…

Evidence: 45 • authority: 72

Telephone country codes are telephone number prefixes for reaching subscribers in foreign countries or areas by international direct dialing (IDD). Country codes are defined by the International Telecommunication Union (ITU) in ITU-T standards E.123 and E.164 and constitute the international telephone numbering plan of the public switched telephone network (PSTN) and other networks. In international calls, they are dialed after the international call prefixes.

Evidence: 33 • authority: 80

Code of practice for installation of private branch exchanges for connection to the British Telecommunications public switched telephone network

Evidence: 33 • authority: 80

Vietnam telephone code change effect will be limited. Headline VIETNAM: Telephone code change effect will be limited

Evidence: 33 • authority: 72

Telecommunications in Antarctica are provided by the countries and organizations that have established research stations on the continent, and commercial satellite and mobile phone providers. There are no undersea cables connecting the continent to the outside world, so all intercontinental communication is accomplished by terrestrial or satellite radio, or physical delivery. Antarctica is included by the International Telecommunication Union (ITU) in any of its internal administrative zones.

Evidence: 33 • authority: 72

Telephone numbers in Canada are a component of the North American Numbering Plan (NANP). The fixed size of each telephone number consists of a three-digit area code, a three-digit central office code, also known as exchange code, and a four-digit station or line code. This is represented as NPA NXX XXXX.

Evidence: 33 • authority: 72

The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits. A numbering plan area may have multiple area codes assigned, a configuration termed an area code overlay. Area codes are also assigned for non-geographic purposes. The syntax rules for area codes do not permit the digits 0 and 1 in the leading position. Area codes with two identical trailing digits are easily recognizable codes (ERC). NPA codes with 9 in the second position are rese…

Evidence: 33 • authority: 80

Pulse code modulation in the telephone industry