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  1. Area codes 314 and 557 are telephone area codes in the North American Numbering Plan (NANP) in the U.S. state of Missouri, serving the city of St. Louis and most of its inner-ring suburbs in neighboring St. Louis County.

  2. Area code 314 is an area code for Missouri. It was one of the primary area codes created in 1947. It initially covered the eastern portion of the state but after it was split by 573 in 1996 and 636 in 1999. It now covers the St. Louis territory. It was overlaid by 557 on August 12, 2022.

  3. 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.

    • 217, 312, 618, 815
    • 216, 419, 513, 614
    • 212, 315, 518, 716, 914
    • 215, 412, 717, 814
  4. This is a list of telephone area codes in the state of Missouri. The area codes are allocated within the North American Numbering Plan (NANP) . The two original area codes for Missouri in 1947 were 314 and 816.

  5. Area code 314 serves the state of Missouri. This area code was assigned on January 1st, 1947. On January 1st, 1947 it went into service. 314 is a General Purpose Code. Dialing pattern for local calls within the same NPA (area code) is 7D.

  6. Area code 314 - Wikipedia. Redirect page. Area codes 314 and 557. categories. From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.

  7. 1993: split to create 905. 2001: overlaid by 647. 2013: overlaid by 437. 2025: overlaid by 942. area code 387 is reserved as a fifth code for the region. 417. Missouri ( Springfield, Joplin, Branson, Lamar, Lebanon, and most of southwestern Missouri) 1950. created from parts of the area codes 314 and 816.