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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]
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.
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 ...
When dialing a telephone number, the area code may have to be preceded by a trunk prefix or national access code for domestic calls, and for international calls by the international access code and country code. Area codes are often quoted by including the national access code. For example, a number in London may be listed as 020 7946 0321.
+51 + area code + phone number Where the plus sign (+) represents the international access code of the country you are calling from. From North America: 011 + 51 + area code + phone number Example: Calling a fixed line in Lima: 011 51 1 1234567; Calling a fixed line in Cusco: 011 51 84 123456; Calling a fixed line in Machu Picchu: 011 51 84 123456
For example, a call from Budapest to Monor (area code 29) would be made as 06 29 123 456 and a call from Monor to Budapest (area code 1) would be made as 06 1 234 5678. When using mobile phones, the international format can be used instead: +36 1 234 5678. Calls to international destinations are in the format 00 + country code + number. On ...
An IMSI is usually presented as a 15-digit number but can be shorter. For example, MTN South Africa's old IMSIs that are still in use in the market are 14 digits long. The first 3 digits represent the mobile country code (MCC), which is followed by the mobile network code (MNC), either 2-digit (European standard) or 3-digit (North American ...