|City of license||Kingsport, Tennessee|
|Broadcast area||Tri-Cities, Tennessee|
|Branding||Nash FM 104.9|
|Slogan||Country For Life|
|First air date||1979 (as WGAT-FM)|
|Former callsigns||WGAT-FM (1979-1981)
|Sister stations||WGOC, WJCW, WQUT, WXSM|
This station was WGAT-FM Mar. 13, 1979, WZXY on Oct. 14, 1981, and changed to its current letters on July 1, 1991.
In the early 1980s, WGAT-FM became WZXY, an AOR station with the nickname "Y-105". Sometime in the mid to late 1980s, WZXY changed formats from AOR to Top 40. Through much of the 1990s and a large part of the 2000s the format was oldies ("Good Times Great Oldies") and then adult hits. The station was called "The Peak" when it changed to hot adult contemporary.
On February 24, 2012 WKOS changed their format to country, branded as "Great Country 104.9".
On July 3, 2013 at 3:00PM EDT WKOS re-branded itself as "Nash FM 104.9".
Nash FM Launch
Nash FM has become one of the biggest brands in country radio and now the Tri Cities has one of their own.
In 2007, the East Tennessee State University men's basketball Team moved its games from WJCW to WKOS. This marked the first time the team was heard on FM radio. This has since been moved to AM 640 WXSM, a sister station. 
- http://fjallfoss.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/call_hist.pl?Facility_id=67674&Callsign=WKOS, Retrieved on 2009-03-26.
- Radio Station WKOS 104.9 FM Retrieved on 2009-03-26.
- ETSU BASKETBALL MOVES TO WKOS RADIO Retrieved on 2009-03-26.
- WKOS official website
- Query the FCC's FM station database for WKOS
- Radio-Locator information on WKOS
- Query Nielsen Audio's FM station database for WKOS
- A commercial for WZXY ("Y-105") from 1982
- One of the commercials for WZXY, as a Top 40 station