660 area code
Where the 660 area code is, its overlay and how to dial a +1 660 number from anywhere.
The 660 area code is in Sedalia, Missouri, United States (Central (CT)). To call from abroad: +1 660 555-0123.
The 660 area code is a geographic North American Numbering Plan (NANP) code covering Sedalia, Missouri. It has been in service since 28-Jul-1997 and sits in the Central (CT) time zone.
How to dial a 660 number
+1 660 555-01231 660 555-0123660 555-0123Cities in the 660 area code
A 660 number is usually in one of these places in Missouri — 1 county.
Other Missouri area codes
Frequently asked questions
Where is the 660 area code?
The 660 area code is in Sedalia, Missouri, United States (Central (CT)).
Do I have to dial 10 digits for 660?
Yes — dial the area code plus the seven-digit number.
How do I call a 660 number from another country?
Dial your exit code (or +), then 1, then 660, then the number: +1 660 555-0123.
Source: NANPA numbering plan. An area code covers a region, not a precise address — a 660 number does not pinpoint a street or ZIP code.
Number holders in area code 660
Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 531 prefixes are in use in 660, shared by 55 companies. The largest holders:
| Company | Prefixes | Share |
|---|---|---|
| Level 3 Communications, LLC | 63 | 12% |
| Embarq Missouri, Inc. Dba Centurylink | 46 | 9% |
| Onvoy, LLC | 41 | 8% |
| Southwestern Bell | 40 | 8% |
| Grand River Mutual Tel Co | 36 | 7% |
| New Cingular Wireless PCS, LLC | 34 | 6% |
Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.
Complaints about 660 numbers
- Reports to the FTC, last 30 days
- 250
- Recorded messages or robocalls
- 63%
- Rank among area codes
- #307 of 670
- Most reported subjects
- Other (79)
- Reducing your debt (credit cards, mortgage, student loans) (44)
- Calls pretending to be government, businesses, or family and friends (40)
Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.
Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).
All US area codes United States +1 Map of area code 660 — cities & rate centres