91X

91X (XETRA-FM) is a Mexican-licensed alternative rock radio station based in Tijuana, Baja California, broadcasting at 91.1 FM. Though licensed in Mexico, its primary audience is in the San Diego, California, area, making it a prominent cross-border station. It was established in 1983 and became well-known for pioneering the alternative rock format in the United States. The station operates in English and has a long history of showcasing emerging alternative and indie artists. Its transmitter is located on Mount San Antonio in Tijuana, providing extensive coverage on both sides of the border.