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  2. Area code 412 - Wikipedia

    en.wikipedia.org/wiki/Area_code_412

    The area code was one of the original North American area codes created in 1947, when it was assigned to the entire southwestern corner of the state. [1] On August 17, 2001, the numbering plan area was converted to an overlay complex with area code 878 , which also forms an overlay with area code 724 , in the surroundings of the 412 service area.

  3. Area code 414 - Wikipedia

    en.wikipedia.org/wiki/Area_code_414

    The area code was created in October 1947, along with area code 715, as one of the two original area codes assigned to Wisconsin.The numbering plan area (NPA) originally included most of the southern and northeastern parts of Wisconsin, stretching from Lake Michigan to the Minnesota and Iowa borders. 715, then as now, covered the remaining northwestern part.

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

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

    414: Wisconsin (Milwaukee County ... area code 387 is reserved as a fifth code for the region; 648: ... overlaid on 412 and area code 724; 879: Newfoundland (all) and ...

  5. List of Oklahoma area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Oklahoma_area_codes

    Map of Oklahoma with area code boundaries. The state of Oklahoma is served by the following area codes: 405/572: Central Oklahoma including Oklahoma City (original area code created in 1947; 572 added as overlay on April 24, 2021 [1] [2] [3] 580: Western and southern Oklahoma (split from 405 in 1997)

  6. List of Wisconsin area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Wisconsin_area_codes

    414† Milwaukee County and several outlying areas served by Milwaukee County exchanges. 608/353: southwestern Wisconsin, including Madison. 715†/534: Overlay complex in northern Wisconsin, including Superior, Eau Claire and Wausau. 920/274: Overlay complex in eastern Wisconsin including Green Bay, the Fox Cities, Manitowoc and Sheboygan. [1]

  7. Area codes 415 and 628 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_415_and_628

    In 1953, the entire Bay Area was "reunited" in using area code 415. Area code 415 has been split three times due to the Bay Area's rapid economic growth and demand for telecommunication services: On March 1, 1959, area code 707 was created from the northern part, and area code 408 was created for San Jose , the South Bay , the Monterey Bay ...

  8. Area codes 310 and 424 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_310_and_424

    Having been staved off nearly seven years, the overlay with 424 was finally implemented on July 26, 2006. On December 31, 2005, customers began dialing 1 + area code + seven-digit number whenever a call is placed by a caller in the 310 or 424 area code to any other area code, including 310 to 424 or 424 to 310. After July 26, 2006, customers ...

  9. Area codes 408 and 669 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_408_and_669

    The coastal area to the west was assigned area code 415. [2] Area code 408 was split from numbering plan area 415 in a flash-cut (without permissive dialing period) on March 1, 1959. The new numbering plan area included most of Santa Clara, Santa Cruz, Monterey and San Benito Counties.