The current KWKW license holds the distinction of being the oldest surviving radio station in the United States to have been built and signed on by a religious institution, while KWKW itself is Southern California's oldest Spanish-language radio station, having begun operations in 1941 as Pasadena station KWKW (1300 AM); its programming moved from 1300 AM to 1330 AM in 1989 when the latter was sold.