Area codes 816 and 975

Area codes 816 and 975 are telephone area codes in the North American Numbering Plan (NANP) for most of the Missouri side of the Kansas City metropolitan area, the St. Joseph area, and all or part of 15 surrounding counties in northwestern Missouri.

Upon its establishment as one of the original 86 area codes in 1947, area code 816 designated the western part of Missouri. bordering with Arkansas, Illinois, Iowa, Kansas, Nebraska, and Oklahoma. The numbering plan area was reduced in 1951 and 1997, and converted to an overlay complex with area code 975 in 2002.