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  2. 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 ...

  3. International call - Wikipedia

    en.wikipedia.org/wiki/International_call

    International call. International telephone calls are those made between different countries. These telephone calls are processed by international gateway exchanges (switches). Charges for these calls were high initially but declined greatly during the 20th century due to advances in technology liberalization.

  4. Collect call - Wikipedia

    en.wikipedia.org/wiki/Collect_call

    A collect call in Canada and the United States, known as a reverse charge call in other parts of the English-speaking world, is a telephone call in which the calling party wants to place a call at the called party 's expense. Collect calls were originally only possible as an operator-assisted call, but with the introduction of computer -based ...

  5. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Worldwide distribution of country calling codes. Regions are coloured by first digit. Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.

  6. Long-distance calling - Wikipedia

    en.wikipedia.org/wiki/Long-distance_calling

    In towns too small to support a phone office, placing long-distance calls was a sideline for some businesses with telephones, such as pharmacies. 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.

  7. Operator assistance - Wikipedia

    en.wikipedia.org/wiki/Operator_assistance

    Operator assistance refers to service provided by a telephone operator to the calling party of a telephone call. This can include telephone calls made from pay phones, calls placed station-to-station, person-to-person, or collect, third-number calls, calls billed to credit cards, and certain international calls which cannot be dialed directly.