KTKX first signed on on December 31, 1967 as a sister station to KBUC. Licensed to Terrell Hills, an enclave city inside of San Antonio, Texas, it aired a Country/Western Format. KBUC would stay on 106.3 until July 18, 1979 which would become KTUF at 106.3. KBUC moved up the dial to 107.5 until the station changed owners and became KZVE 107.5 which would air a Contemporary Spanish format. KBUC would later resurface on 98.3 replacing KBOP and simulcast on 103.7, and later shift further down the dial to 95.7 until 01/07/2005 as Border Media Partners acquired 95.7 moving its regional Mexican La Ley format and KLEY call letters which previously aired on 94.1 now KTFM.