Missouri Area Codes
9 active area codes · Kansas City · Population around 6,243,544
Missouri has 9 active area codes, serving cities like Kansas City, St. Louis, and Springfield. Of those, 6 are overlays covering ground another code already covers, which is why local calls there use all ten digits. The newest, 235, has been in service since March 24, 2024. Each code below links to its cities, carriers, timezone, and coverage map.
Missouri Area Code Map
What area codes does Missouri have?
- 235OverlayColumbiaCentral Time (CT) · 287 cities · 1,181,739
- 314OverlaySt. LouisCentral Time (CT) · 91 cities · 1,094,218
- 417SpringfieldCentral Time (CT) · 203 cities · 1,049,242
- 557OverlaySt. LouisCentral Time (CT) · 91 cities · 1,094,218
- 573OverlayColumbiaCentral Time (CT) · 287 cities · 1,181,739
- 636O'FallonCentral Time (CT) · 78 cities · 1,018,333
- 660SedaliaCentral Time (CT) · 253 cities · 436,301
- 816OverlayKansas CityCentral Time (CT) · 126 cities · 1,375,080
- 975OverlayKansas CityCentral Time (CT) · 126 cities · 1,375,080
More than one of these codes covers 62 of the 115 counties in Missouri, and one county is covered by 4 of them. Each card counts the people inside that code's own boundary at the 2020 census. Adding all 9 gives 9,805,950, against the 6,154,913 the same census counts in those counties, because 3,651,037 residents fall inside more than one code.
Which cities are the largest in Missouri?
How many phone prefixes does Missouri use?
The area codes in Missouri hold 3,933 assigned prefixes between them, listed under 107 distinct carrier names. A prefix is the three digits after the area code, and NANPA assigns each one to a single carrier. Two of the 9 codes here — 235 and 975 — are newer than the NANPA extract behind these numbers, so their prefixes are not counted above.
Sources: City populations – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). State populations – the same program, Vintage 2025 (CO-EST2025-ALLDATA). Area-code footprint and county populations – 2020 Census Centers of Population, mapped against NANP area code boundaries. The share of each city inside a code is measured the same way, against Census place boundaries from the Census Bureau's TIGERweb service. Area code assignments – NANPA CO Code data. See our data methodology.
Frequently Asked Questions
How many area codes does Missouri have?
Missouri has 9 active area codes: 235, 314, 417, 557, 573, 636, 660, 816, 975.
What is the main area code for Missouri?
Of the 9 area codes in Missouri, 816 is the oldest one still serving Kansas City, its largest city. 816 has been in service since 1947.
What are the largest cities in Missouri?
The largest cities in Missouri include Kansas City, St. Louis, Springfield, Columbia, Independence.
What is the total population of Missouri?
Missouri has an estimated total population of 6,243,544 based on US Census PEP 2024 data.
Do I have to dial ten digits in Missouri?
In the parts of Missouri covered by an overlay, yes. 6 of the 9 area codes here cover ground another code already covers, and where two codes share an area, local calls need the area code as well as the seven-digit number.
Why does Missouri have 9 area codes?
They arrived one at a time rather than all at once: 816 has been in service since 1947. 6 of the 9 are overlays, laid over a code that already covered the same ground instead of splitting its map in two. The most recent is 235, in service since March 24, 2024.
What is the newest area code in Missouri?
235, in service since March 24, 2024.
Is my county covered by more than one area code in Missouri?
It may be: more than one area code covers 62 of the 115 counties in Missouri, and one county there is covered by 4 of them. The table above shows which codes reach each of the largest cities.