KWEX-DT, channel 41, is the local Univisión owned and operated station in San Antonio, Texas. The station is the first commercially-based Spanish-language television station in the United States.

KWEX-TV began as KCOR-TV in 1955, named after its radio sister station, which itself was named for Raoul CORtez, the owner and pioneer of the first full-time Spanish-language radio and television stations in the United States by the Radio Corporation of America (RCA). KWEX-TV was also the first UHF channel in south Texas.

In 1961, after years of losing money with KCOR-TV, Cortez sold the station to Emilio Nicolas (his son-in-law), Renold Anselmo, Emilio Azcarraga Vidaurreta, Julian Kaufman, and Frank Fouce. Since the station's beginnings, Nicolas had worked side-by-side with Cortez, not only running the station, but producing many of its variety shows. Nicolas made the station a financial success and in 1962 Nicolas and his partners built their second station in Los Angeles, KMEX-TV channel 34. Thus the first Spanish-language television network began to form.