Rush Limbaugh got his start in political commentary on the station in 1983.
The station now carries Limbaugh's nationally syndicated show along with those of Bill O'Reilly, Neal Boortz, and Mark Levin as well as local hosts Mike Shanin & Scott Parks and Darla Jaye.
KMBZ is the oldest surviving station in Kansas City, first going on the air on April 5, 1922, with the callsign WPE. The Reorganized Church of Latter-Day Saints bought the station in 1923 and renamed the station KFIX and later KLDS. In 1928, Midland Broadcasting bought the station and renamed it KMBC. The AM radio and television station were separated in 1967, prompting the new owners Bonneville International to change the station name to KMBZ. Now owned by Entercom, KMBZ consistently ranks as the most listened talk radio station in the Kansas City market.
The station is one of the country's comparatively few stations to actually have local talk show hosts outside of "morning drive."