KNHS served the local Torrance area, with the signal reaching from beyond the campus. Although it was against school rules for students to carry radios on campus, some students managed to listen with transistor radios and later Walkmans, or on tape recordings the student broadcasters' parents made. KNHS temporarily ceased legal broadcasts when the Torrance Unified School District allowed the station license to expire on 1 December 1983, although it was FCC compliant into 1989. Former North High School students recall that the station broadcast until 1991, raising the possibility that the station was a pirate broadcaster in its last years.