In 1948, WHO-FM 100.3 signed on the air; WHO-FM has changed formats and call letters several times since then and now broadcasts as KDRB, "100.3 The Bus." In 1954, WHO-TV began broadcasting on channel 13.
WHO was owned by the Palmer family until Jacor Broadcasting purchased the station in 1997; Jacor merged with Clear Channel Communications a year later. WHO and the other Clear Channel radio stations in Des Moines (KDRB, KPTL, KKDM, and KXNO) continued to share a building with WHO-TV until they moved into a new facility in 2005.
United States President Ronald Reagan worked as a sportscaster with WHO from 1932 to 1937. Among his duties were re-creations of Chicago Cubs baseball games, for during that time period, teams could not broadcast games live outside of their home areas.
Current local talk show hosts include Van Harden and Bonnie Lucas, co-hosts of the Van and Bonnie morning show; Jan Mickelson; and Steve Deace, who previously did sports talk radio (most recently with sister station KXNO) before taking over the afternoon drive slot in June 2006. Weekend local talk shows include Saturday Morning Live and the WHO Radio Wise Guys. WHO also carries syndicated talk shows such as those hosted by Rush Limbaugh, Dr. Laura, and Michael Reagan.
WHO has also been the longtime home for University of Iowa sports. Jim Zabel, who joined WHO in 1944 , was their play-by-play voice for Hawkeye football and basketball games from 1949 to 1996. While Gary Dolphin now handles those duties, Zabel remains with WHO as co-host (with Jon Miller of HawkeyeNation.com, who is the heir apparent to Zabel as WHO's Sports Director, announced in May 2006) of the Sound Off sports talk show that airs after Hawkeye games, and as co-host of Two Guys Named Jim on Sunday nights with former Iowa State University football coach Jim Walden.
WHO perennially ranks at or near the top of the Arbitron ratings in the Des Moines market.
WHO broadcasts an Internet stream from 4:59 am (Central Time zone) to 10:00 pm weekdays, Saturdays from 6:00 am to 3:00 pm, and Sundays from 6:00 pm to 10:00 pm Legal issues (most likely from the Carson estate, since most of the other programs WHO does not stream are available freely elsewhere) prevent WHO from streaming 24 hours per day.