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  2. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Zone 1 uses an integrated numbering plan; four digits (1xxx) determine the area served in Canada, the United States and its territories, and much of the Caribbean. Zone 2 uses two 2-digit codes (20, 27) and eight sets of 3-digit codes (21x–26x, 28x, 29x), mostly to serve Africa , but also Aruba , Faroe Islands , Greenland and British Indian ...

  3. List of international call prefixes - Wikipedia

    en.wikipedia.org/wiki/List_of_international_call...

    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, the symbol + before the country code may be used irrespective of where the telephone is used at that moment; the network operator ...

  4. International direct dialing - Wikipedia

    en.wikipedia.org/wiki/International_direct_dialing

    The fictitious number (02) 3456 7890 in Sydney, Australia, is published in the form +61 2 3456 7890 for international use. In countries participating in the North American Numbering Plan, such as the United States, Canada, and some Caribbean nations, this number is dialed as 011 61 2 3456 7890, with 011 being the international call prefix for the NANP and 61 being the country calling code of ...

  5. Area code 441 - Wikipedia

    en.wikipedia.org/wiki/Area_code_441

    A permissive dialing period in 441 commenced from 1 October 1995 until 30 September 1996. [3] When calling from countries and territories outside the North American Numbering Plan, the area code is prefixed by the international access code and the country code 1; for example from the United Kingdom, subscribers would dial 00 1 441. [4]

  6. National conventions for writing telephone numbers - Wikipedia

    en.wikipedia.org/wiki/National_conventions_for...

    United States, Canada, and other NANP countries Twenty-four countries and territories share the North American Numbering Plan (NANP), with a single country code, 1 . The formatting convention for telephone numbers is (NPA) NXX-XXXX, where NPA is the three-digit area code , and NXX-XXXX is the seven-digit subscriber number. [ 15 ]

  7. Long-distance calling - Wikipedia

    en.wikipedia.org/wiki/Long-distance_calling

    In some countries, such as Canada and the United States, long-distance rates were historically kept artificially high to subsidize unprofitable flat-rate local residential services. [citation needed] Intense competition between long-distance telephone companies narrowed these gaps significantly in most developed nations in the late 20th century.

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