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  2. List of time offsets by U.S. state and territory - Wikipedia

    en.wikipedia.org/wiki/List_of_time_offsets_by_U...

    This is a list of the time offsets by U.S. states, federal district, and territories. For more about the time zones of the U.S. see time in the United States. Most states are entirely contained within one time zone. However, some states are in two time zones, due to geographical, socio-political or economic reasons.

  3. Telephone numbering plan - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbering_plan

    Unlike other states with overlay area codes (Texas, Maryland, Florida and Pennsylvania and others), the California Public Utilities Commission and the New York State Public Service Commission maintain two different dial plans: Landlines must dial 1 + area code whenever an Area Code is part of the dialed digits while cellphone users can omit the ...

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

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

    The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits.

  5. Category : Area codes in the United States by state or territory

    en.wikipedia.org/wiki/Category:Area_codes_in_the...

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  6. Time zone - Wikipedia

    en.wikipedia.org/wiki/Time_zone

    Time zones of the world. A time zone is an area which observes a uniform standard time for legal, commercial and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time.

  7. List of U.S. states by time zone - Wikipedia

    en.wikipedia.org/?title=List_of_U.S._states_by...

    Retrieved from "https://en.wikipedia.org/w/index.php?title=List_of_U.S._states_by_time_zone&oldid=823382896"

  8. Time in the United States - Wikipedia

    en.wikipedia.org/wiki/Time_in_the_United_States

    From east to west, the four time zones of the contiguous United States are: Eastern Time Zone (Zone R), which comprises roughly the states on the Atlantic coast and the eastern two thirds of the Ohio Valley. Central Time Zone (Zone S), which comprises roughly the Gulf Coast, Mississippi Valley, and most of the Great Plains.

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

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

    The first automated toll-free telephone numbers were assigned with area code 800, created as inbound Wide Area Telephone Service (InWATS) in 1966 (U.S. intrastate) and 1967 (interstate). These terminated on special fixed-rate trunks which would accept calls from a specified calling area with either no limit or a specific maximum number of hours ...