Its original offices, studio, and transmitter were in the front three rooms of Fred and Bernie Baker's home at 605 North Greenwood in Fort Smith, and the antenna was hung on a utility pole in the backyard.

KISR currently transmits with 100,000 watts from an antenna 1,200 feet height above average terrain atop Young Mountain, north of Van Buren, Arkansas.

Its studios and offices are in Central Mall in Fort Smith, AR.

[2] On September 17, 2018 (after stunting with Free's "All Right Now"), KISR launched a classic rock format on its HD3 subchannel, branded as "101.9 The River" (simulcast on translator K270BR 101.9 FM Fort Smith).

[3] In December '23, the station became an affiliate of the syndicated Pink Floyd program "Floydian Slip".