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  2. International direct dialing - Wikipedia

    en.wikipedia.org/wiki/International_direct_dialing

    An "international call prefix", "international dial-out code" or "international direct dial code" (IDD code) is a trunk prefix that indicates an international phone call. In the dialling sequence, the prefix precedes the country calling code (and, further, the carrier code, if any, and the destination telephone number).

  3. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    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.

  4. 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 ...

  5. National conventions for writing telephone numbers - Wikipedia

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

    If you are dialing from another country the international calling code for Malaysia is "60" which may be confusing; do not dial an extra "0" before the rest of the digits. For fixed line and mobile phone numbers, a dash is written in between the area/mobile code and the subscriber number, with an optional space before the last four digits of ...

  6. Long-distance calling - Wikipedia

    en.wikipedia.org/wiki/Long-distance_calling

    However, at the outset, to set up an international call, multiple operators were required: one to originate the call and one at each national gateway to complete a call via either ringdown to a local operator or Operator Toll Dialing. International direct dialling from London to Paris was first offered in March 1963, with Amsterdam following by ...

  7. International call - Wikipedia

    en.wikipedia.org/wiki/International_call

    Dial-around access numbers allow a landline user to call an 08 or 09 number to connect to a service that routes using LCR rather than direct routes. This allows the call to be carried cheaper as the user is getting "around" the expensive direct routing method. [3] It can also be made with the use of a telephone card. [4]