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With all-number calling, the number of permissible central office prefixes increased from 540 to potentially 800, but the first two digits of the central office code were still restricted to the range 2 to 9, and the eight combinations that ended in 11 were reserved as special calling codes. [32]
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.
Telephone dialling codes in Ireland. Country code: +353 International call prefix: 00 Trunk prefix: 0. This is a list of telephone dialling codes for the Republic of Ireland. Fixed-line telephone users do not need to dial the dialling code when they are contacting someone else within their own area.
All local numbers with the area code 066 changed from 5–digit to 7–digit. Numbers in the Tralee MNA were prefixed by 71, in the Dingle MNA by 91, in the Cahirciveen MNA by 94 and the Killorglin MNA by 97. Cork (021) changes to 7 digits. All local numbers with the area code 021 changed from 6–digits to 7–digits in two stages.
The prefixes in the Americas start with one of 1,2,5. All countries in the Americas use codes that start with "5", with the exception of the countries of the North American Numbering Plan, such as Canada and the United States, which use country code 1, and Greenland and Aruba with country codes starting with the digit "2", which mostly is used by countries in Africa.
Central office code 988 was in the process of discontinuation for area code 904. [7] While included in the list of 83 area codes, area code 701 in North Dakota will not be converted to ten-digit dialing because the 32 telephone numbers in the 988 central office were reassigned to another prefix. [8]
Telephone dial number card of c.1948 with the local telephone number 4-5876 in Atlantic City, NJ, using the central office prefix 4, later converted to AT4 Face of a 1939 rotary telephone dial with the telephone number LA-2697, which includes the first two letters of Lakewood, New Jersey, as the central office prefix, later converted to LA6.
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 ...