KXST's transmitter was near Nellis Air Force Base and Interstate 15, on East Tropical Parkway; the sale of the site is a factor in the station's closure.

Because AM 1140 is a clear channel frequency reserved for XEMR in Monterrey, Mexico, and WRVA in Richmond, Virginia, KXST reduced its power to 2,500 watts and used a directional antenna at night.

The station was acquired by Meyer Gold, who relocated the studios to the New Frontier Hotel and Casino, changing the call sign to KLUC, for "Luck".

In the past, AM 1140 ran a variety of formats, including adult contemporary in the 1970s and mid-1980s as KMJJ, heavy metal The Crusher from 1987 to 1990, and then an AM simulcast of co-owned KLUC-FM.

At the same time, the station added Dan Patrick and expanded programming from Sporting News Radio while retaining Opie & Anthony and the Dodgers.

[12][13] In August 2017, a reporter from KLAS-TV obtained an internal e-mail that instructed all of CBS's radio stations in Las Vegas, including KXST, to not cover or otherwise acknowledge the city's new National Hockey League team, the Vegas Golden Knights, on any platform as retaliation for having been outbid by competitor KRLV for rights to be the team's flagship radio station.

In November 2022, Audacy sold the land that the AM transmitter sat on for $40 million in an area currently being developed for industrial warehouse uses; KXST was diplexed with KDWN near the Las Vegas Motor Speedway.

KXST's BetQL schedule was simulcast on the second HD Radio channel of KLUC-FM, and that station continues to carry the network.

[16] Both KXST and KDWN signed off at midnight on February 28, 2023; in the case of KXST, the change on-air was signaled by the station cutting off the beginning of CBS Sports Radio's "After Hours" show, abruptly switching over to "The Star-Spangled Banner" as performed by Chris Stapleton at Super Bowl LVII.