The 660 area code covers Sedalia, Kirksville and 192 more places in Missouri.
Area code 660 is in Missouri, on Central Time. In the 660 area, phone numbers are given out most in Pettis County, then Henry and Saline counties. It has been in service since October 12, 1997.
- Where
- 8 counties in Missouri, mostly Pettis County, Henry County and Saline County
- Time zone
- Central Time
- In service since
- October 12, 1997
- Shares its area with
- No other area code
- Prefixes in use
- 516
- How to dial
- Local calls need all 10 digits: 660-555-0142.
Find out who called you from a 660 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (660) number is on today, use our free carrier lookup.
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Sedalia holds 4% of the phone prefixes in area code 660.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 516 prefixes in use shows where 660 numbers are actually given out.
- Sedalia23 prefixes, 4%
- Kirksville15 prefixes, 3%
- Warrensburg14 prefixes, 3%
- Clinton13 prefixes, 3%
- Maryville10 prefixes, 2%
- Moberly10 prefixes, 2%
- Marshall9 prefixes, 2%
- Chillicothe9 prefixes, 2%
Also served: Butler, Warsaw, Trenton and Boonville and 182 smaller places.
Level 3 (Lumen) holds the most phone number prefixes in area code 660: 63 of 516.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 516 prefixes in use in 660 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| Level 3 (Lumen)Lumen's business and wholesale network | 63 | 12% |
| CenturyLinkLandline company | 47 | 9% |
| Southwestern Bell (AT&T)AT&T's landline company | 40 | 8% |
| Grand River Mutual Telephone | 36 | 7% |
| AT&T MobilityMobile network | 34 | 7% |
| WindstreamLandline company | 26 | 5% |
| 40 other carriers | 270 | 52% |
79% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
660 has covered the same ground since 1997.
1997
660 starts on October 12, 1997, split off from 816.
A 660 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 660 are 816, 913 and 641.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
These are the questions people ask most about area code 660.
Where is area code 660?
660 covers Sedalia, Kirksville, Warrensburg and Clinton and 190 more places in Missouri. In the 660 area, phone numbers are given out most in Pettis County, then Henry and Saline counties.
What state is area code 660 in?
Missouri. 660 is a Missouri area code on Central Time.
What cities use area code 660?
The places holding the most 660 prefixes are Sedalia, Kirksville, Warrensburg, Clinton, Maryville, Moberly, Marshall and Chillicothe, out of 194 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 660?
No single phone company owns 660. NANPA's records show Level 3 (Lumen) holds the most 660 prefixes, 63 of 516, followed by CenturyLink and Southwestern Bell (AT&T). Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 660 in?
660 is on Central Time.
When did area code 660 start?
660 went into service on October 12, 1997, when it was split off from 816.
How do I dial a 660 number?
Local calls need all 10 digits: 660-555-0142.
Is 660 a toll-free number?
No. 660 is a regular area code for Sedalia and Kirksville in Missouri, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 660?
The closest are 816/975 (Kansas City, Missouri), 913 (Kansas City, Kansas), 641 (Mason City, Iowa) and 636 (Saint Charles, Missouri), measured between the centres of each area.
Who called me from a 660 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 660 a scam?
660 is a real Missouri area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.