Area code 785 is the area code for telephone exchanges in most of northern Kansas. It was created in a split of the numbering plan area 913 on July 20, 1997, and stretches from the Colorado state line on the west to the Missouri state line on the east, while excluding the Kansas side of the Kansas City metropolitan area, which retained 913. The largest city by population in the numbering plan area is the Kansas state capital, Topeka.