All 9 Missouri area codes
Every active code: tap any card for its full guide, who called, cities and ZIPs, map, spam patterns and local time.
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Why metro st. Louis has 3 area codes
When a region uses more numbers than one code can hold, new codes are overlaid on the same territory rather than forcing anyone to change numbers. Metro St. Louis now uses 314, 557 and 636: same neighborhoods, ten-digit dialing, and every one of them covered by its own guide above.
Missouri area codes by City
The largest Missouri communities and the area codes that serve them. Every city links to its local AT&T internet page.
How Missouri got its codes
Every Missouri area code, in the order it entered service. Splits carved new regions; added codes overlay existing ones, which is why ten-digit dialing is standard.
| In service | Code | How it arrived |
|---|---|---|
| 1947 | 314 | One of the original area codes of 1947 |
| 1947 | 816 | One of the original area codes of 1947 |
| 1950 | 417 | Original assignment for its region |
| 1996 | 573 | Added to the 314 region |
| 1997 | 660 | Split from 816 |
| 1999 | 636 | Split from 314 |
| 2022 | 557 | Added to the 314 region |
| 2023 | 975 | Added to the 816 region |
| 2024 | 235 | Added to the 573 region |
Source: NANPA NPA database, July 2026. Regenerated monthly.
Missouri area code map
Every active Missouri area code at a glance, anchored to the metro each one serves. Click or tap any region on the map to open that code’s full guide.
How Missouri’s codes work
How Missouri splits
St. Louis runs on 314 and 557, Columbia on 573 and 235, and Kansas City on 816 and 975. The other three territories each carry a single code.
Overlays share one territory
An overlay serves the exact same area as the code it joins: new numbers, same map. St. Louis carries two (314, 557), and 235 and 975 overlay their regions the same way.
Reading the map
Each color is one code territory. The chip shows the main code with its overlays beneath it, and clicking any region opens that code’s full guide.
Every code links to a full guide.
Who called, cities and ZIPs, maps and spam patterns.
Take the map with youPoster format with every Missouri area code, its overlays, and a QR code back to this page.↓ Download the printable PDF
Internet, wireless & stores across the state
AT&T home internet in Missouri
AT&T home internet is available across Missouri, checked address by address; every area code guide above lists its cities and what’s offered there.
AT&T Fiber: Ltd. avail/areas. Speeds based on wired connection. Actual speeds vary. For 5-GIG, single device wired speed maximum 4.7Gbps. For more info., visit att.com/speed101.
Start with home internet in Missouri, or pair it with wireless in an internet + wireless bundle.
AT&T wireless in Missouri
AT&T’s 5G network covers most of Missouri. ActiveArmor® spam blocking is included with every unlimited plan, your number stays yours when you move between Missouri codes, and great cell phone deals in Missouri are a tap away.
AT&T may temporarily slow data speeds if the network is busy. 5G req’s compatible plan & device. Coverage not available everywhere. Learn more at att.com/5Gforyou.
AT&T stores across Missouri
From the Saint Louis metro to St. Louis, Springfield and beyond, walk in for switching, porting, upgrades and hands-on help. Every area code guide lists its nearest stores.
Find stores in: Saint Louis · St. Louis · Springfield · Columbia · Kansas City
