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  2. List of Illinois area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Illinois_area_codes

    With the depletion of new numbers in area codes 312 and 773, an overlay of both of them, area code 872, was created in November 2009, beginning ten-digit dialing within the city limits of Chicago. The remaining area without an overlay in the northern part of Illinois, 708, eventually received such with area code 464 taking effect on January 21 ...

  3. List of Florida area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Florida_area_codes

    In 1988, area code 407 was introduced for the Orlando area. [1] In 1995, area code 954 was introduced for Broward County. In 1996, area code 239 was introduced for southwest Florida and area code 352 for the areas around Gainesville and Ocala. Many new area codes were introduced in the first two decades of the 21st century, as a result of city ...

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

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

    once reserved as a third area code for West Virginia, but it was replaced by a 304-932 exchange area code + exchange number in Charleston; 933: not in use; available for non-geographic assignment easily recognizable code (ERC) 934: New York (Suffolk County on Long Island) July 16, 2016: overlaid on 631; 935: not in use; available for geographic ...

  5. Interchangeable NPA and central office codes - Wikipedia

    en.wikipedia.org/wiki/Interchangeable_NPA_and...

    [1] [2] This change in numbering format was implemented first for central office codes by 1973, which eliminated the restriction in the middle digit (2 to 9) to also permit 0 and 1. The middle position of the area code could only be 0 and 1. In 1995, this restriction for area codes was lifted as well, creating interchangeable NPA codes.

  6. No longer just ‘the 618,’ southern Illinois is scheduled for ...

    www.aol.com/news/no-longer-just-618-southern...

    Customers receiving the 730 area code will be required to dial 10 digits — the area code and phone number — for all local calls, just as customers with telephone numbers with the 618 area code ...

  7. Original North American area codes - Wikipedia

    en.wikipedia.org/wiki/Original_North_American...

    Telephone dial number card of c.1948 with the local telephone number 4-5876 in Atlantic City, NJ, using the central office prefix 4, later converted to AT4 Face of a 1939 rotary telephone dial with the telephone number LA-2697, which includes the first two letters of Lakewood, New Jersey, as the central office prefix, later converted to LA6.

  8. List of Illinois state agencies - Wikipedia

    en.wikipedia.org/wiki/List_of_Illinois_state...

    There are also many boards, commissions and offices, [1] including: Abraham Lincoln Presidential Library and Museum; Attorney Registration & Disciplinary Commission of the Supreme Court of Illinois

  9. Area code split - Wikipedia

    en.wikipedia.org/wiki/Area_code_split

    The existing central office prefixes are maintained and only the central offices of the new divisions are reassigned to a new area code. The impact of a split on the general public involves the printing of new stationery, advertisements, and signage for many customers, and the dissemination of the new area code to family, friends, and customers.