 Five days later, on April 20th, KPWT changed call letters to KTKX to go with the "X106.7" branding.This was not the first time the AAA format was tried in San Antonio; the first was KMFR "103.7 Mighty Fine Rock" from 2001-2004 (now KAHL-FM airing Adult Standards).On November 15, 2010, KTKX turned to a straight-ahead classic rock format to compete directly with rival KZEP.