Missouri area codes: full list with cities and how to dial
Missouri has roughly 6.2 million residents, and its phone numbers are organized into 9 area codes under the North American Numbering Plan. Missouri is served by 9 active geographic area codes, anchored by 314 in the Kansas City area. The St. Louis, Kansas City and southeastern Missouri regions use overlays requiring ten-digit dialing. Every Missouri number is dialed as +1, then the three-digit area code, then a seven-digit local number. With Phonecall you can call any Missouri landline or mobile straight from your browser. There is no app to install, no SIM, and no subscription. You see the per-minute rate before you dial, billing is by the second, and your first call is free.
Call Missouri from your browserAll Missouri area codes
9 active geographic area codes in service across Missouri.
| Area code | Primary cities and region | Example number |
|---|---|---|
| 314 | St. Louis and immediate suburbs (overlay of 314/557) | +1 (314) 555-0100 |
| 557 | St. Louis (overlay of 314) | +1 (557) 555-0100 |
| 816 | Kansas City and St. Joseph metro (overlay of 816/975) | +1 (816) 555-0100 |
| 975 | Kansas City area (overlay of 816) | +1 (975) 555-0100 |
| 636 | Outer St. Louis suburbs (St. Charles, Jefferson, western St. Louis County) | +1 (636) 555-0100 |
| 573 | Eastern and southeastern Missouri: Columbia, Jefferson City, Cape Girardeau (overlay of 573/235) | +1 (573) 555-0100 |
| 235 | Eastern and southeastern Missouri (overlay of 573) | +1 (235) 555-0100 |
| 417 | Southwestern Missouri (Springfield, Joplin, Branson) | +1 (417) 555-0100 |
| 660 | Northern and western Missouri (Sedalia, Kirksville, Warrensburg) | +1 (660) 555-0100 |
Example numbers use the reserved 555-0100 range and are for illustration only.
How to call Missouri from abroad
Every Missouri phone number is part of the +1 North American calling zone. To reach one from outside the United States, dial three parts in order:
- 1. Your exit code, then +1 — the US country code.
- 2. The three-digit area code — for example 314 for the Kansas City area.
- 3. The seven-digit local number.
Example, full international format:
+1 (314) 555-0100
With Phonecall you skip the exit codes entirely. Enter the number in international format and we connect the call from your browser, billed by the second from $0.03/min, with no SIM, no app, and no monthly fee.
Why Missouri has multiple area codes
The St. Louis, Kansas City and southeastern Missouri regions use overlays requiring ten-digit dialing.
When a region runs low on available numbers, the phone system adds capacity in one of two ways. A split divides the old region geographically and gives part of it a brand-new area code. An overlay keeps the existing code and layers a second one on top of the same area, which is why a single city can have several area codes and why ten-digit dialing becomes the norm. Either way, the number you dial always stays the same length: +1, the area code, then seven digits.
9
active area codes
~6.2 million
residents (approx.)
Kansas City
largest city
Calling Missouri with Phonecall
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Missouri area codes: frequently asked questions
What is the main area code for Kansas City?
Kansas City, the largest city in Missouri, is primarily served by area code 314 (St. Louis and immediate suburbs (overlay of 314/557)). Missouri has 9 area codes in total, listed in full above.
How do I dial a Missouri number from another country?
Dial your international exit code, then +1 (the US country code), then the three-digit Missouri area code, then the seven-digit local number. With Phonecall you just enter the number in international format and we connect the call from your browser, from $0.03/min.
How many area codes does Missouri have?
Missouri currently has 9 active geographic area codes in service. The St. Louis, Kansas City and southeastern Missouri regions use overlays requiring ten-digit dialing.