During the unofficial first year (1988–89) of broadcast, KBLR aired ethnic-oriented programming and African, Asian and Latino musical footage constantly, though the TV Guide listed other programming, such as G.I. Joe and B movies.
In 1993, Summit Media put together a partnership group to purchase KBLR Television, channel 39. This failing television station became a success under the experience and direction of Mr. Gentry, as he built and developed, the first full-power Spanish language television station in Las Vegas.
On February 23, 2005, NBC bought Telemundo affiliate KBLR from Summit American (formerly Summit Media also owns KQLL, KJUL) for $32.1 million. The sale was completed on May 24, 2005.
In August 2008, KBLR confirmed reports from the Las Vegas Sun and announced at the city council meeting that its studio facility would be moving to Neonopolis on Fremont Street, which is part of the Fremont Street Experience. The stations studios was first occupied on January 20 with full completion on Feb. 22, 2009. KBLR began broadcast operations from the new facility at 4:45 am on February 22, 2009.
The station previously had a repeater in Reno, Nevada, K52FF channel 52; this station has since gone dark, and its license cancelled.