List of Missouri area codes

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This is a list of telephone area codes in the state of Missouri.

314: St. Louis and many of its immediate suburbs

417: The southwestern corner of Missouri, including Springfield, Joplin and Branson

573: Eastern Missouri excluding the St. Louis area but including Jefferson City, Columbia, Rolla, Cape Girardeau and Hannibal

636: Greater St. Louis area, including St. Charles, Jefferson, and western St. Louis counties; forms a ring surrounding the immediate St. Louis area (314)

660: Northwestern Missouri excluding the Kansas City and St. Joseph metropolitan areas, but including Sedalia, Kirksville, Warrensburg and Maryville

816: The Kansas City and St. Joseph metropolitan areas

The two original area codes for Missouri in 1947 were 314 and 816. Area code 417 was split off in 1950, and the other area codes followed more than 40 years later.

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