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Up to this time, the maximum size of an Australian telephone number was six digits. Until the early 1960s, the first one or two digits of telephone numbers in metropolitan areas were alphabetic, with each letter representing a distinct number on the telephone dial. Each one-letter or two-letter code signified an exchange within an urban area.
Country codes are defined by the International Telecommunication Union (ITU) in ITU-T standards E.123 and E.164. The prefixes enable international direct dialing (IDD). Country codes constitute the international telephone numbering plan. They are used only when dialing a telephone number in a country or world region other than the caller's.
ISO 3166-1 alpha-2 – two-letter country codes which are also used to create the ISO 3166-2 country subdivision codes and the Internet country code top-level domains. ISO 3166-1 alpha-3 – three-letter country codes which may allow a better visual association between the codes and the country names than the 3166-1 alpha-2 codes.
In late March 1990, Canberra's area code changed from (062) to (06) by integrating the 2 into the subscriber number, thus allowing 200 000 more numbers to be registered. In the 1950s-1960s the telephone number was a two letter alphabetic exchange code followed by a 4 digit number.
ISO 3166-1 alpha-2: two-letter code; ISO 3166-1 alpha-3: three-letter code; ISO 3166-1 numeric: three-digit code; The two-letter codes are used as the basis for other codes and applications, for example, for ISO 4217 currency codes; with deviations, for country code top-level domain names (ccTLDs) on the Internet: list of Internet TLDs.
This is a listing of lists of country codes: List of ISO country codes (ISO 3166) ITU country code (International Telecommunication Union) List of country calling codes E.164; Mobile country code E.212; Maritime identification digits; List of ITU letter codes (radiocommunication division) UIC country code (International Union of Railways) List ...
This is a list of international dialing prefixes used in various countries for direct dialing of international telephone calls.These prefixes are typically required only when dialling from a landline, while in GSM-compliant mobile phone (cell phone) systems, only the symbol + before the country code may be used [citation needed] irrespective of where the telephone is used at that moment; the ...
For example, the 2x1 format of two letters (2 => VK), one numeral (x => 3), one letter (1 => Z) licence VK3Z was assigned to VK3ZGP with an official notification dated October 13, 2021. Note: The Australian Maritime College (responsible for issuing and management of Amateur 2x1 licences) provides the current 2x1 Callsign Register via 2X1 ...