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  2. Indiana Bell - Wikipedia

    en.wikipedia.org/wiki/Indiana_Bell

    Throughout the 1940s and 1950s the company continued to expand by acquiring many smaller telephone companies throughout the state. After the 1984 Bell System Divestiture, Indiana Bell became a part of Ameritech, one of the seven original Regional Bell Operating Companies. In 1990, the independent board of directors of Indiana Bell was dissolved ...

  3. Area codes 317 and 463 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_317_and_463

    The new area code, which spells out IND on a standard telephone keypad, made 317 the second Indiana area code to be overlaid after area code 812 was overlaid with 930 in March 2015. [3] Area code 463 entered service on March 15, 2016. On that date, a permissive dialing period began during which both seven- and ten-digit calls would be able to ...

  4. List of Indiana area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Indiana_area_codes

    317 covered all of Northern and Central Indiana until 1948, when 219 was created. Central Indiana remained under the 317 banner until 1997, when growth in and around Indianapolis prompted the creation of 765. The 317 area code was, in turn, overlaid by 463 in 2016.

  5. Local access and transport area - Wikipedia

    en.wikipedia.org/wiki/Local_access_and_transport...

    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. List of Lumen Technologies operating companies - Wikipedia

    en.wikipedia.org/wiki/List_of_Lumen_Technologies...

    The following companies were acquired from Embarq, which was formed in 2006 by the spin-off of the local telephone operations of Sprint Corporation (previously named United Telephone). It also includes companies formerly owned by Centel which was purchased by Sprint in 1993. CenturyLink of Florida, Inc.

  7. Telephone exchange names - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange_names

    Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]

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