 In February 2001, 103.3 would drop its classic country format and moved the KTBL callsign and format over to 1050 AM.After stunting from February 12–14 with all R.E.M., U2 and Dave Matthews Band each day, 103.3 would launch as "The Zone" on February 15 with callsign KTZO.KTZO originally had an adult alternative music format, playing in 20 song sets as a "quality rock" station.