KJKO (FM)

 (98.3 FM; "98.3 Jack FM Omaha") is a radio station broadcasting the variety format. Licensed to, the station serves the. WEEK's studios are located in the in West Omaha and it's transmitter is located in. WEEK-FM is one of the few stations west of the Mississippi River with a "W" call sign.

Early years
The station signed on circa May 1973 as KONR (Omaha's New Radio), a AC-format station.

Disco-ONR (1979-1980) and KONR Magic! (1980-1986)
KONR-FM ran a disco format from 1979-1980 as Disco-ONR. After the disco craze ended, Disco-ONR switched it's format to variety and became KONR Magic!.

98.3 The Express (1987-1996)
On January 6, 1987, after stunting with 's "Showroom Dummies" being played on a loop for a few days following New Years' Eve, KONR Magic! was discontinued for the debut of rock radio station 98.3 The Express, with it's first song being "You Give Love a Bad Name" by. Omaha disc jockey Eric Kielmansegg, who had previously mocked KONR during it's Disco-ONR days, was hired as the new head DJ and "rock n' roll chairman".

WEEK Omaha Rocks! (1996-2004)
On December 27, 1995, 98.3 The Express began stunting with "I Wanna Rock" by being played on a loop. On January 1, 1996, KONR relaunched as WEEK Omaha Rocks!, matching it's new call sign given in a live legal ID on New Years Eve shortly after the loop ended. Eric Kielmansegg continued to be head DJ, naming the listeners the "WEEKling Army".

98.3 Omaha's Classic Rock (2004-2009)
WEEK-FM relaunched as 98.3 Omaha's Classic Rock on November 5, 2004. The last song as WEEK Omaha Rocks! was "The Final Countdown" by and the first song as 98.3 Omaha's Classic Rock was "Hello, Goodbye" by. The new nickname for the listeners was the "WEEKling Corps".

98.3 AMP Radio (2009-2016)
WEEK-FM was sold by then-owner  in 2009 to. On August 3, 2009, the day the sale was completed, the station abruptly switched from classic rock to Top 40 CHR as 98.3 AMP Radio, matching new sister station in. WEEK relaunched as AMP Radio with 10,000 songs played commercial free.

98.3 Jack FM Omaha (2016-present)
In November 2016, CBS Radio sold WEEK-FM to Interstate Broadcasting, Inc. of. The sale was completed on November 20, on that day WEEK-FM laid off it's on-air talents and began stunting with an all-Christmas music format as '''Ho! Ho! 98.3''' for the holiday season. The all-Christmas music format lasted until the morning of December 25, when the station relaunched under the Jack FM franchise as 98.3 Jack FM Omaha.

On May 6, 2019, Interstate Broadcasting, Inc. sold off WEEK-FM and five other stations to RKO Radio in a deal worth $23,000,000. The sale did not affect WEEK's branding or format.