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  2. Telephone numbers in Canada - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Canada

    Telephone numbers in Canada follow the fixed-length format of the North American Numbering Plan (NANP) of a three-digit area code, a three-digit central office code (or exchange code), and a four-digit station or line code. This is represented as NPA NXX XXXX. [1]

  3. List of North American Numbering Plan area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_North_American...

    this was the first part of North America to have its code changed three times: from 213 to 714 1951: to 619 in 1982, and to 760 in 1997; was to have originally split off the portion of 760 serving San Diego County to a new 442 area code in late 2008/early 2009; that plan was cancelled; 2009: overlaid by 442; 761

  4. Area codes 410, 443, and 667 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_410,_443,_and_667

    By 2011, the 410/443 area was once again running out of numbers because of the continued proliferation of cell phones. To spare residents another number change to a new area code, a third overlay code, area code 667, was implemented on March 24, 2012. [5] This had the effect of assigning 24 million numbers to just over four million people.

  5. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    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 ...

  6. List of telephone country codes - Wikipedia

    en.wikipedia.org/.../List_of_telephone_country_codes

    An area code of three digits dialed after the country code determines the area served in the United States and its territories, Canada, and much of the Caribbean. Zone 2 uses two 2-digit codes (20, 27) and eight sets of 3-digit codes (21x–26x, 28x, 29x), mostly to serve Africa , but also Aruba , Faroe Islands , Greenland and British Indian ...

  7. Area codes 609 and 640 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_609_and_640

    Area codes 609 and 640 are telephone overlay area codes in the North American Numbering Plan (NANP) for the central and southern parts of the U.S. state of New Jersey. The numbering plan area includes the cities of Trenton , Princeton , Ewing , Hamilton , and southeastern parts of the state and the Jersey Shore , including Atlantic City and ...

  8. Lists of North American area codes - Wikipedia

    en.wikipedia.org/wiki/Lists_of_North_American...

    The largest telephone numbering plan in North American is the North American Numbering Plan (NANP), serving 25 regions or countries. Other countries maintain an autonomous numbering plan with distinct country codes within the international E.164 specifications by the International Telecommunication Union. Original North American area codes

  9. North American Numbering Plan expansion - Wikipedia

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

    In NANP telephone number specifications, the letter N represents a numeral from 2 through 9, while the letter X represents any numeral. Thus, NXX is a number from 200 through 999, while XXXX is a range from 0000 through 9999. The first three digits of a telephone number are the numbering plan area code (NPA code, or simply NPA).

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