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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).
Worldwide distribution of country calling codes. Regions are coloured by first digit. Telephone country codes, but also sometimes referred to as country dial-in codes, or historically international subscriber dialing (ISD) codes in the U.K., are telephone number dialing prefixes for reaching subscribers in foreign countries or areas via international telecommunication networks.
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 ...
International direct dialling was introduced in the 1970s, so calls can be dialed by country code without an operator. International calls can be paid via telephone card (aka phone card, calling card). These popular telecommunications products allow users to initiate
International callers should dial +92 xx yyyyyyyy. All mobile phone codes have four digits, and start with 03xx. All mobile numbers have seven digits, and denote the mobile provider on a nationwide basis and not geographic location. Thus all Telenor numbers (for example) nationwide carry mobile code 0345 etc. Universal access number 111 xxx xxx
In feature group 'D', the current system, subscribers may dial the prefix "10" and a three-digit code identifying a long-distance carrier to handle the InterLATA call. For example, 10-288 sent a call via AT&T, 10-333 via Sprint, and 10-550 via CenturyLink. Starting in July 1998, [13] "10" needed to be used before the five-digit carrier ...
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The dialing rules may include variable-length dialing for area code, trunk access and international access prefixes, central office/service access numbers, and calling cards tone numbers. [ 2 ] [ 3 ] With this approach, phone numbers stored in the phone book remain unchanged when the user moves to a different geographical location or selects a ...