Missouri Area Codes
Directory of all 9 telephone area codes assigned to Missouri.
Missouri phone numbers are served by 9 area codes operating in the Central timezone.Because an overlay is active, 10-digit dialing is mandatory across much of the state. No area codes in Missouri are currently flagged as high-risk scams.
Most populated prefix: area code 816 (Missouri)
All Area Codes in Missouri
Area Code 235
Columbia, Jefferson City, Cape Girardeau, Rolla, Farmington, Hannibal, Poplar Bluff, Jackson, Sikeston, Fulton
Area Code 314
St. Louis, Florissant, University City, Kirkwood, Maryland Heights, Webster Groves, Arnold, Creve Coeur, Ferguson, Clayton
Area Code 417
Springfield, Joplin, Nixa, Ozark, Republic, Carthage, Lebanon, Neosho, Webb City, Branson
Area Code 557
St. Louis, University City, Kirkwood, Maryland Heights, Webster Groves, Arnold, Creve Coeur, Ferguson, Clayton, Overland
Area Code 573
Columbia, Jefferson City, Cape Girardeau, Rolla, Farmington, Hannibal, Poplar Bluff, Jackson, Sikeston, Fulton
Area Code 636
O'fallon, St. Charles, St. Peters, Florissant, Wentzville, Chesterfield, Wildwood, Ballwin, Hazelwood, Lake St. Louis
Area Code 660
Sedalia, Warrensburg, Kirksville, Washington, Marshall, Moberly, Maryville, Clinton, Chillicothe, Boonville
Area Code 816
Kansas City, Independence, Lee's Summit, St. Joseph, Blue Springs, Liberty, Raytown, Gladstone, Grandview, Raymore
Area Code 975
Kansas City, Independence, Lee's Summit, St. Joseph, Blue Springs, Liberty, Raytown, Gladstone, Grandview, Raymore
Major Cities Served by Missouri Area Codes
The most populous urban centers and census places covered by Missouri's area codes, ranked by population.
Missouri Area Code FAQs
Quick answers to common questions about Missouri telephone area codes.
How many area codes does Missouri have?
Missouri has 9 area codes: 235, 314, 417, 557, 573, 636, 660, 816, 975.
What timezone do Missouri area codes use?
Missouri area codes operate in the Central timezone.
What is the most populated area code in Missouri?
Area code 816 is the most populous prefix in Missouri based on covered city population.
Which Missouri area codes share an overlay?
235 and 573, 314 and 557, 816 and 975. Overlay codes serve the same area, which is why 10-digit dialing is required.
Are there scam area codes in Missouri?
Missouri has no area codes currently flagged as high-risk scams.
About Missouri Area Codes & Phone Dialing Rules
When placing calls within Missouri, ten-digit dialing (area code + 7-digit telephone number) is required in overlay regions where multiple area codes serve the same geographic boundaries.