XHRF La Poderosa 103.9 FM

XERF-AM is a Mexican clear-channel station on 1570 kHz in Ciudad Acuña, Coahuila, near the United States border. It gained fame as a 250-kilowatt border blaster owned by Ramon D. Bosquez and Arturo Gonzalez, used by famed disc jockey Wolfman Jack. Now branded as La Poderosa, it is owned by the Instituto Mexicano de la Radio (IMER), a Mexican public broadcaster.