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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 ...
Area code 876 was created on 1 May 1997 for Jamaica. [1] In 2019, the numbering plan area received a second area code, 658, in formation of an overlay to relieve central office code exhaustion. The telephone country code for reaching telephone numbers in the country is 1 .
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
Mobile phones use geographic area codes (two digits): after that, all numbers assigned to mobile service have nine digits, starting with 6, 7, 8 or 9 (example: 55 15 99999–9999). 90 is not possible, because collect calls start with this number.
The NANP Administrator (NANPA) has allocated the area codes 876 and 658 for use in the country, which is a single numbering plan area (NPA) with an overlay numbering plan. The national telephone number format is NPA-NXX-XXXX, where N is one of the digits 2 through 9, and X is any digit. For international dialing to Jamaica, the country code is 1.
A telephone prefix is the first set of digits after the country, and area codes of a telephone number. In the North American Numbering Plan countries (country code 1), it is the first three digits of a seven-digit local phone number, the second three digits of the 3-3-4 scheme. In other countries, both the prefix and the number may have ...
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 ...
This code specifies that the entire number should be 15 digits or shorter, and begin with an international calling prefix and a country prefix. For most countries, this is followed by an area code, city code or service number code and the subscriber number, which might consist of the code for a particular telephone exchange.