KISF signed on in May 1992 under the call letters KEDG, and adopted a modern rock music format branded as "The Edge". The station debuted at #1 in the Las Vegas ratings and was influential in other stations nationwide flipping to the format. In 1996, KEDG gained a direct competitor as KFBI adopted a harder edged modern rock music format under the call lettersKXTE. On June 5, 1998, at Noon, KEDG flipped to urban oldies under the call letters KISF - branded as "Kiss-FM". In 1999, Hispanic Broadcasting Corporation (which eventually became Univision Radio) acquired the frequency, transforming 103.5 into the first Spanish FM radio station serving the Las Vegas Hispanic community.