KILA 95.5 FM signed on the air in 1972. KILA became Las Vegas first Contemporary Christian music station. KILA switched frequencies in 1985 from 95.5 FM to 90.5 FM.
KILA became part of the SOS radio network in the early 2000s. KILA became KSOS in 2005.
KSOS also airs its programming on a station in Utah, known as KANN, from Roy, Utah.
KSOS also broadcasts in Kingman, Az, at 103.1 FM.