[3] WACO-FM has an effective radiated power (ERP) of 90,000 watts, broadcasting from a tower 1,660 feet (505.968 m) in height above average terrain (HAAT).

In the late 1960s, WACO-FM switched to an automated easy listening format while the AM station continued to play country music.

[6] WACO-FM was bought by Capstar Broadcasting, which was later acquired by Clear Channel Communications, a forerunner of current owner iHeartMedia.

In addition, WACO-FM is also one of a small number of call signs whose beginning letter deviates from FCC standards of W in the East and K in the West.

Stations already on the air, such as WOAI in San Antonio and WBAP in Fort Worth, were allowed to keep their W call signs.

In 1960, when WACO added an FM counterpart, that station was able to share its unique call letters, with an -FM suffix.

In 1996, WACO (AM) changed its call letters to KKTK and later moved into the Dallas-Fort Worth Metroplex radio market as KCLE.