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  2. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    International access. 011. List of dialing codes. The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1. Some North American countries, most notably ...

  3. Coverage map - Wikipedia

    en.wikipedia.org/wiki/Coverage_map

    Coverage map. Coverage maps are designed to indicate the service areas of radiocommunication transmitting stations. Typically these may be produced for radio or television stations, for mobile telephone networks and for satellite networks. Such maps are alternatively known as propagation maps. For satellite networks, a coverage map is often ...

  4. Original North American area codes - Wikipedia

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

    The original North American area codes were established by the American Telephone and Telegraph Company (AT&T) in 1947, after the demonstration of regional Operator Toll Dialing during the World War II period. The program had the goal of speeding the connecting times for long-distance calling by eliminating intermediary telephone operators.

  5. Local access and transport area - Wikipedia

    en.wikipedia.org/.../Local_access_and_transport_area

    Map of LATAs in the US. Local access and transport area (LATA) is a term used in U.S. telecommunications regulation.It represents a geographical area of the United States under the terms of the Modification of Final Judgment (MFJ) entered by the United States District Court for the District of Columbia in Civil Action number 82-0192 or any other geographic area designated as a LATA in the ...

  6. Area code 586 - Wikipedia

    en.wikipedia.org/wiki/Area_code_586

    Area code 586. Coordinates: 42.6°N 83.0°W. Map of area code 586 in Michigan. Area code 586 is the telephone area code serving much of Macomb County, Michigan, introduced in 2001 as a split from area code 810. Its territory was originally part of area code 313.

  7. Area codes 541 and 458 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_541_and_458

    The service area includes the cities of Eugene, Springfield, Corvallis, Albany, Medford, Bend, Ashland, Klamath Falls, The Dalles, Burns, Lakeview, and Pendleton, as well as the coastal region from Lincoln County to the California border. Area code 541 was created in an area code split from area code 503 on November 5, 1995.

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