660 Area Code: Sedalia, Missouri

Northern and west-central Missouri outside the immediate Kansas City metro is served by the 660 area code, with Sedalia as the primary city in the directory's records. Sedalia sits in the rolling country of west-central Missouri about an hour east of Kansas City, organized around a downtown that has retained a substantial cluster of late-nineteenth-century buildings and the Missouri State Fairgrounds, which have hosted the state fair every summer since the 1880s. The 660 footprint extends through Marshall, Trenton, Chillicothe, Kirksville (Truman State University), and the surrounding small cities and rural counties of northern and west-central Missouri.

Records linked to 660 numbers in the directory often include Columbia, Kansas City, O'Fallon, and Springfield — Missouri cities outside the 660 footprint. The pattern reflects standard public-record dynamics, with phone numbers porting across Missouri and addresses linked across multiple cities. The directory currently documents 232 distinct prefixes within 660 in detail, a working subset of the prefix population the code carries.

Sedalia's home values come in dramatically below the US median, in line with broader rural Missouri pricing. Median household income runs below the national figure, the city's median age sits a few years under the US reading, and population is modest in absolute terms — Sedalia itself is small, and the broader 660 footprint covers an unusually large geographic stretch of Missouri with a relatively dispersed population spread across small cities and farming counties.