KFXD (630 AM) is a commercial radio station, owned by Townsquare Media, which airs a rhythmic contemporary format branded as "Power 105.5".

Following the entrance of the United States into World War I in 1917, the high school was selected as one of the sites to be used for training Signal Corps radio operators.

[13] Initially, there were no formal restrictions for which radio station license categories could make broadcasts intended for the general public.

In 1921, 7YA added a 5-watt homemade radiotelephone transmitter, and began a limited schedule of broadcasts, consisting of "classroom work, news and market reports".

[citation needed] Harry Redeker continued as KFAU's station manager until he left the school's faculty in 1928.

KFXD later lost the rights to broadcast Boise State Broncos athletics, to rival AM station 670 KBOI.

On August 30, 2013, it was announced that Townsquare Media would purchase Peak Broadcasting's stations, including KFXD.

[25] On October 23, 2020, KFXD dropped its sports format and began stunting with songs containing "change" in their titles, jokingly branded as "105.5 Darrell FM", a reference aimed at crosstown competitor Iliad Media Group's CEO, Darrell Calton, because it was reported that during the previous few weeks he had been cybersquatting on multiple web domain names for KFXD's frequency.