Area code 660 is the telephone area code in the North American Numbering Plan (NANP) for the northern and western part of the U.S. state of Missouri. It was created on October 12, 1997 in a split of area code 816.Where is area code 660?
Area code 660 is found in the US state of Missouri. Primarily servicing the city of Sedalia (population: 34362), area code 660 covers 39 counties of Missouri. Located in the Central time zone, area code 660 is on the same time as Chicago, IL. Area code 660 was brought into effect on October 12, 1997.