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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 ...
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.
When dialing a mobile number, "xxx" represents the mobile operator code. All mobile operator codes begin with the number 07. "zzzzzzz" represents the main telephone number of seven digits. The country code for Sri Lanka is 94, so the format becomes "+94 XX Y ZZZZZZ" for landlines and the format becomes "+94 XX ZZZZZZZ" for mobile numbers. [4]
The ITU-T Recommendation E.212 defines mobile country codes (MCC) as well as mobile network codes (MNC). The mobile country code consists of three decimal digits and the mobile network code consists of two or three decimal digits (for example: MNC of 001 is not the same as MNC of 01). The first digit of the mobile country code identifies the ...
In telecommunications, a country code, or international subscriber dialing (ISD) code, is a telephone number prefix used in international direct dialing (IDD) and for destination routing of telephone calls to a country other than the caller's.
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.
The number is presented starting the country calling code. This is called the globalized format of an E.164 number, and is defined in the Internet Engineering Task Force RFC 2806. [6] The international calling prefix is a trunk code to reach an international circuit in the country of call origination. [7]
This works as follows: (1) the Registrar provides the Subscriber (or Registrant) with a domain name, the URI, that will be used for accessing a DNS server to fetch a NAPTR record, (2) a personal E.164 telephone number (the ENUM number). The URI domain name of (1) is biunivocally associated (one-to-one mapped) to the subscriber E.164 ENUM number ...