Despite its relatively modest population, Kansas was divided into two numbering plan areas (NPAs) when the original North American Numbering Plan was established in 1947. Under a preliminary plan, area codes were to be assigned sequentially based on geography and Kansas received area codes 617 and 618. When the final plan was adopted In October 1947, Kansas' two numbering plan areas were redrawn. The southern half (Wichita, Dodge City, Emporia, Garden City) received 316, while the northern half (Kansas City, Topeka, Lawrence, Salina, Hays) got 913. Long-distance dialing by subscribers using area codes would not be implemented until late 1951 in New Jersey.