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  2. List of telephone country codes - Wikipedia

    en.wikipedia.org/.../List_of_telephone_country_codes

    Worldwide distribution of country calling codes. Regions are coloured by first digit. Telephone country codes, originally termed International Codes by the International Telegraph and Telephone Consultative Committee (C.C.I.T.T.) in 1960, [1] but also sometimes referred to as "country dial-in codes", or historically "international subscriber dialing" (ISD) codes in the U.K., are telephone ...

  3. 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 ...

  4. National conventions for writing telephone numbers - Wikipedia

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

    Except for short codes and emergency numbers, all telephone numbers in Sri Lanka have ten digits (initial 0 + nine numbers). Landline phone numbers begin with the area code, then one digit for the operator code, then six digits for the primary telephone number. Format: (XXX Y ZZZZZZ) where: "xxx" denotes the area code.

  5. Telephone numbers in Australia - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Australia

    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.

  6. 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 ...

  7. List of mobile telephone prefixes by country - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_telephone...

    example 971 530 000 000 with country code is 12 digits 54: Etisalat: example 971 540 000 000 with country code is 12 digits 55: Du: example 971 550 000 000 with country code is 12 digits 56: Etisalat: example 971 560 000 000 with country code is 12 digits 58: Du: example 971 580 000 000 with country code is 12 digits United Kingdom [16] +44 ...

  8. Operator assistance - Wikipedia

    en.wikipedia.org/wiki/Operator_assistance

    A third number call or third party call is an operator assisted telephone call that can be billed to the party other than the calling and called party. The operator calls the third number for the party to accept the charges before the call can proceed. Time and charges was a service that could be requested of an operator before a call began ...

  9. Telephone number verification - Wikipedia

    en.wikipedia.org/wiki/Telephone_number_verification

    Telephone number verification (or validation) services are online services used to establish whether a given telephone number is in service. They may include a form of Turing test to further determine if a human answers or answering equipment such as a modem , fax , voice mail or answering machine .