Area Code 660

Missouri

Area code 660 serves Missouri, primarily Sedalia, in the Central Time (CT) time zone. It was created from a split of area code 816.

Published:

Split Area Code

This area code was created by splitting an existing area code into separate geographic regions. When a split occurs, some customers in the original area code region are assigned the new area code.

This area code was split from area code 816 (Kansas City).

In service since: 12-Oct-1997

Learn more about overlay and split area codes →

Demographics & Economics

Total Population
729,140
Population Density
22 people/sq mi
below U.S. average (U.S.: 93 people/sq mi)
Median Household Income
$60,148
below U.S. median (U.S.: $75,144)
Poverty Rate
14.1%
above U.S. average (U.S.: 11.5%)
Unemployment Rate
3.8%
near U.S. average (U.S.: 3.6%)
Education Attainment
Bachelor's Degree+
20.6%
below U.S. average (U.S.: 33.7%)
High School or Lower
44.1%

Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.

See how this area code compares to all US area codes in the Statistics dashboard.

Time Zone

  • Central Time (CT)

NANPA Relief Status

According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.

Source: NANPA NPA Relief Planning Reports · See all relief planning statuses

Current Time

Central Time (CT)
 
 

Prefix Utilization

Geographic Coverage

State

MO

Major Cities

  • Sedalia
  • Warrensburg
  • Kirksville
  • Marshall
  • Moberly
  • Maryville
  • Chillicothe
  • Clinton
  • Boonville
  • Trenton
  • Macon
  • Higginsville
  • Lexington
  • Butler
  • Brookfield
  • Whiteman AFB
  • Carrollton
  • Bethany
  • Windsor
  • Knob Noster
  • Fayette
  • Tipton
  • Marceline
  • Concordia

and 238 more cities

Area Code 660 geographic coverage map (light mode)

Demographics

The estimated population served by area code 660 is approximately 729,140. The population density is 22 people per square mile, which is lower than the national average of 93. The median household income is $60,148, which is lower than the national median of $75,144. Approximately 20.6% of adults hold a bachelor's degree or higher, compared to the national rate of 33.7%. This rate is lower than the national average. The poverty rate stands at 14.1%, which is higher than the national rate of 11.5%.

History

Area code 660 was created from a split of area code 816. It was introduced in 1997 as part of a geographic division to provide additional numbering resources.

County Coverage

Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 660).

CountyPopulationShare
Pettis, MO77,62710.6%
Johnson, MO61,0628.4%
Cooper, MO59,8878.2%
Benton, MO36,4235.0%
Adair, MO29,7584.1%
Randolph, MO29,7454.1%
Saline, MO28,2853.9%
Livingston, MO27,7953.8%
Henry, MO27,6483.8%
Nodaway, MO23,6163.2%
Monroe, MO23,2043.2%
Daviess, MO22,2923.1%
Macon, MO21,5943.0%
Lafayette, MO19,4132.7%
Chariton, MO17,7412.4%
Linn, MO14,5692.0%
St. Clair, MO14,4952.0%
Howard, MO13,8041.9%
Grundy, MO12,9901.8%
Bates, MO12,8551.8%
Morgan, MO12,5031.7%
Sullivan, MO11,9971.6%
Carroll, MO11,5451.6%
Harrison, MO11,3341.6%
Hickory, MO11,0291.5%
Gentry, MO9,6181.3%
Knox, MO9,0421.2%
Moniteau, MO8,9931.2%
Scotland, MO7,7451.1%
Putnam, MO7,5691.0%
Atchison, MO6,7110.9%
Clark, MO6,6310.9%
Ray, MO6,4630.9%
Mercer, MO5,1900.7%
Schuyler, MO4,9390.7%
Holt, MO4,7830.7%
Caldwell, MO4,6530.6%
Andrew, MO2,6750.4%
Shelby, MO2,5090.3%
Worth, MO2,5040.3%
DeKalb, MO2,2340.3%
Lewis, MO2,0160.3%
Cass, MO1,0740.1%
Vernon, MO5800.1%

Area Code 660 Family Tree

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816660975
1
Total Codes
0
Splits
0
Overlays
0
Max Depth

Area code 660 was originally assigned in 12-Oct-1997 to serve MO.

Call Context

Mixed urban-rural area

This area code spans a mix of urban centers and rural communities across MO, with Sedalia as a primary city.

Nearby Area Codes

Area codes geographically closest to 660.

Area code 816 map card showing Kansas City (light mode)
816MOKansas CityCentral Time (CT)Geographic
Area code 975 map card showing Independence (light mode)
975MOIndependenceCentral Time (CT)Overlay
Area code 913 map card showing Overland Park (light mode)
913KSOverland ParkCentral Time (CT)Geographic
Area code 641 map card showing Marshalltown (light mode)
641IAMarshalltownCentral Time (CT)Split

Other Area Codes in Missouri

Area codes that also serve Missouri, linked for easy comparison.