Owned by Austin-based Corridor Television, KCWX maintains offices on South Piedras Drive in northwest San Antonio, and its transmitter is located on the Gillespie–Kendall county line. KCWX TV, San Antonio, Texas. KCWX is a MyNetworkTV local network affiliate in San Antonio, TX. KCWX is a television station in Fredericksburg, TX that serves the San Antonio television market. Live feed of MyNetworkTV-affiliate station in San Antonio, Texas, with many popular syndicated tV shows.