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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. Area code 417 was split off from 816 in 1950, and the other area codes followed more than 40 years later, due to the proliferation of ...
In 1947, the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes. The state of California was divided into three numbering plan areas (NPAs) with distinct area codes: 213, 415, and 916, for the southern, central, and northern parts of the state ...
2023: returned to the pool of area codes available for future area code relief; 457: Louisiana (Shreveport–Bossier City, Monroe, Alexandria, Fisher, Tallulah, and most of northern Louisiana) September 25, 2025 [3] to be overlaid on 318; previously a fictitious area code assigned to identify Naked DSL/Dry Loop and dedicated data lines in ...
List of Missouri area codes; 0–9. Area codes 314 and 557; Area code 417; Area codes 573 and 235; Area code 636; Area code 660; Area codes 816 and 975
Area code 816 served points generally north and west of Columbia and Jefferson City, while area code 314 served the eastern third of the state, including St. Louis. In 1951, a third NPA with area code 417 was created for southwestern Missouri, including the cities of Branson , Joplin , and Springfield .
The area code split became effective at day end of January 7, 1996, with a permissive dialing period commencing until July 7, 1996, during which the new numbering plan area could be dialed with both area codes. Although area code splits were intended as long-term solutions, within only two years, 314 was close to exhaustion once again due to ...
They also serves all of southeastern Missouri (including the Missouri Bootheel area) and areas adjacent to the Mississippi River. 573 was created on January 7, 1996, in a split of area code 314, which was limited to the St. Louis metropolitan area in Missouri, and 235 was added on March 24, 2024 as part of an overlay complex.
Numbering plan areas in California (blue) and border states. This map is clickable; click on any region shown to visit the page for those area codes.Area codes 657 and 714 are shown in red. Area codes 714 and 657 are telephone area codes in the North American Numbering Plan (NANP) for the southern part of the U.S. state of California.