The station signed on the air in 1999 as a WZUP-13, a UPN affiliate available only on cable (TCI and later Cox channel 13). It was the second UPN affiliate (of three) in the Baton Rouge area. When the station went over the air on November 26, 2002, it changed its call sign to KZUP-19--originally it was going to air on channel 21 and (WB affiliate WBRL-CA was on channel 19, but this assignment was short-lived. Channel 19 was once used as a translator station for local station and original UPN affiliate WBTR, and when KZUP went on the air, WBTR moved to previously-unused channel 41. It became an independent station after losing the UPN's rights to Raycom Media's WBXH-CA in 2003. As an independent, it called itself "Z-19," and it primarily aired African-American-centered programming like Good Times, The Fresh Prince of Bel-Air, and The Jeffersons. For brief periods in 2005, KZUP was used to air WVLA and WGMB programming when those two stations were converting to high-definition programming. KZUP became an affiliate of Retro Television Network on September 15, 2008. In 2012, for unknown reasons, White Knight Broadcasting dropped RTN from KZUP, and the station currently airs a mixture of infomercials and syndicated programming using its previous logo and branding, "Z-19," although RTV ids periodically air on the station mistakenly.