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There are many recommendations for recording phone numbers. The most common in the world is Recommendation E.123 E.123 International Telecommunication Union [11] and the standard format for Microsoft telephone numbers Microsoft. [12] There is an international format for recording a telephone number containing the country code, settlement code ...
E.164 defines a general format for international telephone numbers. Plan-conforming telephone numbers are limited to only digits and to a maximum of fifteen digits. [1] The specification divides the digit string into a country code of one to three digits, and the subscriber telephone number of a maximum of twelve digits.
In addition to digit count, the format may be restricted to certain digit patterns. ... Telephone numbers for users within such systems are often published by ...
This rounded the total number of digits in a subscriber telephone number to ten: a three-digit area code, a three-digit central office code, and four digits for each line. This fixed format defined the North American Numbering Plan as a closed numbering plan , [ 27 ] as opposed to developments in other countries where the number of digits was ...
Since currently the 4th digit (or digit 'D') cannot be 1 or 0, if the telephone system detects 1 or 0 in the 4th position it will process the number as a new 12-digit number, and if it is any digit other than 1 or 0, it can process it as an existing 10-digit number until the transition is complete.
North American Numbering Plan members are assigned three-digit numbering plan area (NPA) codes under the common country code 1, shown in the format 1 (NPA). Within an NPA, all telephone numbers have seven digits. 1 – United States, including United States territories: 1 (340) – United States Virgin Islands; 1 (670) – Northern Mariana Islands
A Swiss rotary telephone dial from the 1970s showing the telephone's number (94 29 68), along with those of various local emergency services Telephone numbers for sale in Hong Kong. A telephone number is the address of a telecommunication endpoint, such as a telephone, in a telephone network, such as the public switched telephone network (PSTN).
TIM there are many legacy 9-digit numbers 361: 13 (3 10) TIM operator reserved (TACS legacy routing number) 362: 13 (3 10) TIM operator reserved (GSM/UMTS routing number) 363: 12 ("36" 10-digit MSISDN) TIM operator reserved (voice mail) 366: 10: TIM: 368: 9-10: TIM there are many legacy 9-digit numbers 370: 10