six: 816, 417, 660, 573, 636, 314
As of 2012, Missouri has 6 area codes:314 = St. Louis417 = Springfield, Joplin, southwest573 = Jefferson City, Columbia, southeast636 = St. Charles, outer suburbs of St. Louis660 = Sedalia816 = Kansas City
The North American area code system started in 1947. Missouri originally had just two area codes, 816 for the western half and 314 for the eastern half.
The 636 area code is used by the state of Missouri. It generally applies to the eastern and central areas of Missouri - other area codes used by the state include 314, 417 and 573.
Dial the ISD code to US (001) and then dial the number you wish. There are several different area codes for different parts of Missouri.
The total area of Missouri is 69,709 square miles (sq. miles).
about 23
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There are about 300 area codes in the United States, about 30 in Canada, and about 20 in other miscellaneous islands in or near the Caribbean that share country code +1 with the US and Canada. There are about 400 area codes in Mexico. There are about 600 area codes in the UK. There are about 5,200 area codes in Germany.
There are currently 10 area codes in Ohio. When Ohio needs more area codes they will introduce an eleventh area code for the Columbus/Central Ohio area and a twelfth area code for the Cincinnati region.
Missouri has hundreds of zip codes. Follow the link below and you can look up specific zip codes by city.
There are many area code listings on the internet.
six area codes: 928 602 623 480 520