Area Code 660 Location

Area code 660 serves Marshall, Missouri, and a wide stretch of north and west‑central Missouri. Centered in Saline County, Marshall sits along the Missouri River region and anchors a network of rural towns, farms, and small cities. The 660 service area surrounds the Kansas City metro (816) but focuses on communities outside the big-city core, reaching north toward the Iowa line and south toward Sedalia and Warrensburg. It follows Central Time and covers both landline and mobile phone numbers.

Major cities and notable places in area code 660 include:

• Marshall — county seat and home to Missouri Valley College
• Sedalia — site of the Missouri State Fairgrounds
• Warrensburg — home to the University of Central Missouri; near Whiteman Air Force Base
• Kirksville — home to Truman State University and A.T. Still University
• Maryville — home to Northwest Missouri State University
• Chillicothe — known for its “Home of Sliced Bread” claim
• Moberly, Trenton, Macon, Carrollton, and Chillicothe — key hubs for regional services and agriculture

Established in the late 1990s, area code 660 was created in 1997 as a split from 816 to meet growing demand for new phone numbers across rural Missouri. There is no overlay on 660, so local phone numbers use the single area code across this region. For calling, the standard format is +1 660 xxx xxxx, and number portability means many wireless and VoIP providers assign 660 to both residential and business lines. Marshall’s central role in the 660 footprint makes it a practical base for education, healthcare, and regional commerce.

“Area code 660 was created in 1997 from a split of 816.” — North American Numbering Plan Administrator (NANPA)