Missouri · Central Time
660 Area Code
Area code 660 is in Missouri, serving northern and west-central rural Missouri outside the Kansas City area. It is in the Central Time zone.
Last updated October 1, 2026 · Source: NANPA
Where is the 660 area code?
660 is a Missouri area code covering northern and west-central rural Missouri outside the Kansas City area. In the wider directory it sits in the Midwest region.
Cities in the 660 area code
- Sedalia
- Warrensburg
- Kirksville
- Marshall
- Moberly
- Maryville
- Chillicothe
- Boonville
- Clinton
- Macon
- Trenton
- Carrollton
Counties served by 660
Pettis County, Johnson County, Adair County, Saline County, Randolph County, Nodaway County, Livingston County, Cooper County, Henry County and Macon County.
Dialing 660
Sedalia, MO is currently served by the single area code 660, with no overlay. Ten-digit dialing (area code + seven-digit number) always works and is increasingly the norm nationwide; some local calls may still connect with seven digits. If a future overlay is added, 10-digit dialing would become mandatory.
From outside the US, dial +1 660 followed by the seven-digit number.
History of the 660 area code
660 went into service on October 12, 1997, created when it was split from 816. It serves Sedalia and the surrounding part of Missouri. For how codes are created, split, and overlaid, see how area codes work.
Is 660 a scam or spam risk?
660 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 660 number on your screen is no guarantee the caller is in Sedalia, MO or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other Missouri area codes
Explore more
See every code in Missouri, compare codes across the Midwest region, or view all Central Time codes. You can also browse the 6XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
660 area code FAQ
Where is the 660 area code?
The 660 area code is in Missouri, covering northern and west-central rural Missouri outside the Kansas City area, in the Midwest region.
What cities are in the 660 area code?
Cities in the 660 area code include Sedalia, Warrensburg, Kirksville, Marshall, Moberly, Maryville, Chillicothe, Boonville, Clinton and Macon.
What time zone is 660 in?
660 is in the Central Time zone.
When did the 660 area code start?
660 went into service on October 12, 1997.
Do I have to dial 10 digits for 660?
Ten-digit dialing always works, and many areas now require it; some local calls in this area may still connect with seven digits.
Is 660 a toll-free or premium code?
No. 660 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.