This station broadcast on AM frequency 1550 kHz and was under ownership of Cumulus Media.
Its studios were located at the Amarillo Building downtown on Polk Street, and its transmitter tower was based in Canyon, where the station was licensed to serve.
In January 2008, it began airing hot talk John Clay Wolfe and the daily nooner weekdays at 12 from ESPN Radio affiliate KSEY from Vernon, Texas.
The facility had experienced issues with its antenna tuning unit since 2018, resulting in prolonged periods of silence.
On February 20, 2020, KNSH swapped callsigns with KLSZ-FM, a Nash FM country station in Fort Smith, Arkansas.