On November 20, 1968, Radiodifusora del Pacífico, S.A. de C.V., then-owner of XETRA-AM, received a concession for a new FM station with the same callsign, XETRA-FM on 91.3 MHz.
In 1996, the U.S. marketing and operating rights to 91X were acquired by Jacor Communications, and simultaneously the Mexican concession was sold to XETRA Comunicaciones, S.A. de C.V. Jacor was acquired by Clear Channel Communications in 1999.