. "-6" . . "Crestline is an unincorporated community in Cherokee County, Kansas, United States. Crestline is located on U.S. Route 400 7.5 miles (12.1 km) east of Columbus. Crestline has a post office with ZIP code 66728."@en . "620" . . "66728" . "265.0"^^ . . "-5" . "264.871"^^ . . "Crestline, Kansas"@en .