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  2. Area codes 614 and 380 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_614_and_380

    Area codes 614 and 380 are telephone area codes in the North American Numbering Plan (NANP) for all or part of four counties in central Ohio, surrounding and including the state capital of Columbus. Area code 614 is one of the original area codes assigned for Ohio in 1947, while area code 380 is an overlay code covering the same territory.

  3. List of Ohio area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Ohio_area_codes

    Central and southeastern Ohio except Columbus: December 6, 1997: 220: April 22, 2015: 614: Columbus: October 1947: 380: February 27, 2016: 937: Southwestern part of Ohio including Dayton, Springfield, public parts of Wright-Patterson Air Force Base, and areas north and east of the Cincinnati metropolitan area: September 28, 1996: 326: March 8 ...

  4. Area codes 740 and 220 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_740_and_220

    By the end of 2013, exhaust studies indicated that the 740 area code would run out of telephone numbers sometime in 2015. The Public Utilities Commission of Ohio chose a relief plan by implementing an overlay with new area code 220, effective April 22, 2015. This requires all calls within the numbering plan area to be dialed using the full ten ...

  5. 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]

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

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

    not in use; reserved in case a block of consecutive numbers is ever needed 377 is an easily recognizable code (ERC) 380: Ohio (Columbus and Franklin County) February 27, 2016: overlaid on 614 in Ohio; 381: not in use; available for geographic assignment 382: Ontario (London, Windsor, Kitchener-Waterloo, Cambridge, and most of southwestern ...

  7. Battelle Memorial Institute - Wikipedia

    en.wikipedia.org/wiki/Battelle_Memorial_Institute

    It reached an $80 million settlement in 1975 (equivalent to $452,987,013 in 2023), used to demolish Union Station, build Battelle Hall at the Columbus Convention Center, refurbish the Ohio Theatre and create Battelle-Darby Creek Metro Park. The institute lost its nonprofit status in the 1990s, though regained it by 2001.