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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 ).
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 ...
Country codes are defined by the International Telecommunication Union (ITU) in ITU-T standards E.123 and E.164. 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.
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 ...
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]
Conference calls can be designed so that the calling party calls the other participants and adds them to the call; however, participants are usually able to call into the conference call themselves by dialing a telephone number that connects to a "conference bridge," which is a specialized type of equipment that links telephone lines.
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This page was last edited on 22 June 2016, at 12:53 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...