Area codes / Missouri
Missouri area codes
Missouri has 9 area codes in service, in the Central time zone. Pick one for a local business number your Missouri customers recognize.
Every Missouri area code
| Area code | Time zone | Overlaid with | In service since |
|---|---|---|---|
| 235 | Central | 573 | 2024 |
| 314 | Central | 557 | 1947 |
| 417 | Central | None | 1950 |
| 557 | Central | 314 | 2022 |
| 573 | Central | 235 | 1996 |
| 636 | Central | None | 1999 |
| 660 | Central | None | 1997 |
| 816 | Central | 975 | 1947 |
| 975 | Central | 816 | 2023 |
Picking a Missouri area code
314 and 816 are among the original area codes created in 1947. 6 Missouri area codes share their region with an overlay, so a new number there may come in either code; both ring the same area, and calls within it are dialed with all ten digits.
Already have a Missouri number customers know? Move it to Onyx Phone for free, and keep answering while it moves.
Getting started
- Create a login and pick a plan. Checkout saves a card for the 7-day free trial, and nothing is charged until it ends.
- Confirm your business and its 911 address, and get a local number on the spot. Bringing your own number? You answer on a temporary one while it moves over, for free.
- Choose where calls ring, write what callers hear, invite your team, and register for texting. Then answer in the browser, the iPhone and Android apps, or a desk phone. How it works has the details.
Included on every plan
Starter is $17, Business is $29, Scale is $42 per user a month, or less billed yearly. The plan includes a business number for each user and unlimited calling and texting in the US and Canada. Every plan starts with a 7-day free trial, and moving your current number over is free.
Area code data from NANPA, file of October 24, 2026.