[3] The original call sign was KMOX-FM, sister station to AM powerhouse KMOX 1120, owned by CBS.

By the late 60s, KMOX-FM had a separate format, playing easy listening music and was partially automated in its early years.

The focus then shifted to an adult contemporary and soft rock style of music by the 1970s, which was also used at other FM stations owned by CBS Radio.

In the summer of 1981, KMOX-FM began gradually evolving its format toward Top 40/CHR by adding more current hits to its playlist.

KHTR was an almost immediate success, quickly becoming the #2 station in the demographic group 12 years old and over in the market, behind only sister KMOX 1120.

(1) The "Hot Hits" format led to the station sometimes being referred derisively as "Keep Hearing Those Repeats", a play on the KHTR call letters.

During the mid to late 2010s, KLOU’s playlist was updated to some 90s hits and fewer 70s titles, with a core focus on music from the 1980s.

Even though iHeartMedia owns several flagship stations of NFL teams, St. Louis was the only market in which Clear Channel used this concept.

As with other Clear Channel and iHeart HD subchannels, "All Rams Radio" was available for free streaming on the iHeartRadio app.

While the NFL has been fairly strict regarding its prohibition of broadcasting live games, no comment was made about this arrangement.