How many area codes does Missouri have?

Missouri has 6 active geographic area codes in the North American Numbering Plan: 314, 417, 573, 636, 660, 816. Each code serves a distinct region or acts as an overlay for a high-demand metro area.

What is the oldest area code in Missouri?

The oldest area code in Missouri is 314, assigned in 1947. It serves St. Louis and the St. Louis City and Inner Suburbs region. 314 is one of the original 86 area codes created when the North American Numbering Plan was first established.

Can I get a Missouri phone number from anywhere?

Yes. DialPhone virtual phone numbers are not tied to a physical location. You can get a Missouri area code number and use it from any device — desktop, mobile, or browser — anywhere with an internet connection. This makes Missouri numbers ideal for remote teams, distributed businesses, and sales teams targeting Missouri customers.

How much does a Missouri area code number cost?

DialPhone plans start at $24 per user per month on the Core plan. Every plan includes your choice of Missouri area code number, unlimited US and Canada calling, business SMS, AI call captions, and a free 14-day trial — no credit card required. See the DialPhone pricing page for current tier details.

Can I port my existing Missouri number to DialPhone?

Yes. DialPhone supports free number porting from any major US or Canadian carrier, including existing Missouri area code numbers. Porting typically completes in 2 to 5 business days with zero service interruption. See the complete number porting guide for step-by-step instructions.

What time zones are used in Missouri?

Missouri area codes span the CT time zone. When scheduling calls with Missouri customers, verify the specific area code's time zone to avoid calling outside business hours.

Area Codes in Missouri — Local Business Phone Numbers

Quick answer

Missouri has 6 active geographic area codes covering St. Louis, Kansas City, St. Peters. The most-recognized codes are 314, 816, 417, serving St. Louis and the St. Louis City and Inner Suburbs region.

Total codes: 6
Top metro: St. Louis
Time zone: CT
Largest code: 314 (St. Louis)

By Darshan M

Growth Operations Lead at DialPhone · Verified against NANPA data

Area codes in Missouri

Missouri is served by 6 active geographic area codes in the North American Numbering Plan. These codes were assigned between 1947 and 1999 as population and call demand grew across the state.

Code	Primary City	Region	Established	Overlay Codes	Population
314	St. Louis	St. Louis City and Inner Suburbs	1947	557	1,000,000
417	Springfield	Southwestern Missouri	1947	—	600,000
573	Columbia	Central-Southern Missouri	1996	—	700,000
636	St. Peters	St. Louis Suburbs	1999	—	800,000
660	Sedalia	Northern Missouri	1998	—	300,000
816	Kansas City	Kansas City Metro (Missouri side)	1947	975	1,000,000

Time zones in Missouri

All area codes in Missouri fall in the CT time zone.

CT — area codes: 314, 417, 573, 636, 660, 816

Top metros and their area codes

Below are the primary cities in Missouri and the area codes that serve each metro. Cities with multiple codes share geography due to overlay assignments added as demand grew.

Columbia — 573
Kansas City — 816
Sedalia — 660
Springfield — 417
St. Louis — 314
St. Peters — 636

Why get a local Missouri number?

A Missouri area code number gives your business three core advantages:

Local trust signal. Customers in Missouri recognize local area codes as their own. A familiar caller ID builds immediate credibility for service businesses, sales teams, and patient communication.
Higher answer rate. Calls from a local area code are answered far more often than toll-free or out-of-area numbers — industry data puts the lift at 20–40%. That difference matters most for outbound sales, appointment confirmations, and service callbacks.
Targeted marketing. Advertising a local Missouri number on print, radio, digital, and outdoor channels converts better than a national 800 number for audiences who prefer doing business locally.

How to get a Missouri area code number with DialPhone

Setting up a Missouri business number takes under 10 minutes:

Sign up for a DialPhone plan. Choose any plan starting at $24/user/month. Free 14-day trial, no credit card required.
Search available Missouri numbers. Filter the DialPhone number inventory by state, area code, city, or number pattern.
Choose your number and configure. Assign your new Missouri number to a user or team, configure call routing, voicemail, AI receptionist, and business SMS.
Port your existing number (optional). Already have a Missouri number? Free number porting completes in 2 to 5 business days with zero service interruption.