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  2. List of telephone country codes - Wikipedia

    en.wikipedia.org/wiki/List_of_telephone_country...

    Zone 5 uses eight 2-digit codes (51–58) and two sets of 3-digit codes (50x, 59x) to serve South and Central America. Zone 6 uses seven 2-digit codes (60–66) and three sets of 3-digit codes (67x–69x) to serve Southeast Asia and Oceania. Zone 7 uses an integrated numbering plan; two digits (7x) determine the area served: Russia or Kazakhstan.

  3. Area codes 503 and 971 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_503_and_971

    On July 1, 1999, area code 971 was created as a concentrated overlay for most of the numbering plan area, with the exceptions of Clatsop and Tillamook counties. [3] Initially, ten-digit dialing was to become mandatory in that service area on January 30, 2000, but the date was extended until October 1, 2000.

  4. List of mobile telephone prefixes by country - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_telephone...

    All mobile phone numbers start with "2" and each of them has 8 digits (without country code),. For example: 371 2 63 12345 Lebanon +961: 03: 8 (03-Abcdef) where A is 1/2/3/4/5 for Alfa and 0/6/7/8/9 for Touch: 70 +8 (70-Abcdef) where A is 1/2/3/4/5 for Alfa and 0/6/7/8/9 for Touch: 71 (71-Abcdef) where A is 1/2/3/4/5 for Touch and 0/6/7/8/9 for ...

  5. Telephone numbers in El Salvador - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_El...

    Digit X Use within the structure (2) XYZ–MCDU [1] 0: Not used in this structure – reserved for future use. 1: For future use in the Metropolitan area. 2 and 5: Used for identifying the fixed telephony service in any locality within the Metropolitan area known as “San Salvador”. 3

  6. North American Numbering Plan expansion - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering...

    The North American Numbering Plan is based on a ten-digit telephone number assigned to each telephone in the telephone network. The number is composed of the three-digit numbering plan area code, a three-digit central office code, and a four-digit station or line number. Certain rules govern the numerical format of each part.

  7. Toll-free telephone numbers in the North American Numbering ...

    en.wikipedia.org/wiki/Toll-free_telephone...

    When a toll-free number is dialed, each digit is analyzed and processed by the LEC. The toll-free call is identified as such by the service switching point (SSP). The SSP is responsible for sending call information to the service control point (SCP), routing the request through at least one signal transfer point (STP) in the Signalling System 7 ...

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