The station started in 1925 by Wilson Duncan Broadcasting as AM 1370KWKC. In 1936 it changed its call letters to KCMO. In 1939 it moved to 1450 AM and then 1480 AM in 1941. In November, 1947 it moved to 810 AM. It stayed at 810 for more than half a century. During much of that time, KCMO was a CBS Radio Networkaffiliate, carrying its line up of dramas, comedies, news, sports, soap operas, game shows and big band broadcasts during the "Golden Age of Radio." Walter Cronkite was a sports announcer at the station in 1936 with the on air name of "Walter Wilcox". While at KCMO, Cronkite met his wife, Mary Elizabeth Maxwell, and later left to become a reporter for United Press International, before becoming a long-time TV anchor for CBS News.
In 1953, television station KCMO-TV was launched. The Meredith Corporation acquired both the radio and television stations in October 1953, less than a month after the television station went on the air. Meredith later acquired what became KCMO-FM, 94.9 FM. In 1978 Meredith built a new facility for its broadcasting stations in Fairway, Kansas. The radio stations were spun off from the television station in 1983. Later, the TV station changed its call letters to KCTV. That year, Richard Fairbanks bought both KCMO and KCMO-FM. The stations were then sold to the Summit Communications Group in 1985, then to the Gannett Company in 1986. Bonneville International, which already owned rival stations KMBZ and KLTH, acquired both KCMO stations in 1993.
In 1997, Bonneville sold its entire Kansas City cluster plus three radio stations in Seattle to Entercom Communications. On October 3, 1997, shortly after Entercom assumed control of the KCMO stations, KCMO swapped frequencies with WHB, with KCMO moving to its present-day dial position of 710 AM and WHB relocating to 810 AM. Due to the way the switch was structured, the Federal Communications Commission considers KCMO to be legally the same station as the old WHB. In 2000, Entercom was forced to sell both KCMO stations to Susquehanna Radio after its purchase of Sinclair Broadcasting's Kansas City properties, KQRC-FM, KXTR-FM and WDAF-FM. The acquisition left Entercom two stations over the FCC's single-market ownership limit. Cumulus Media became the owner of both KCMO and its FM sister station in 2006 with its acquisition of Susquehanna.
Changes under Cumulus ownership
When Cumulus assumed control of the station in mid-2006, local morning host Van Patrick quit on air, apparently upset over the firing of his producer as well as others in the building, during a national layoff of Cumulus employees. On September 12, the station began a new morning show, hosted by Chris Stigall. Stigall has since left the station, being replaced by Rob Carson. Carson was later replaced by Gregg Knapp as morning host. Pete Mundo is the latest morning drive time personality. On April 30, 2012, KCMO began simulcasting on FM translator 103.7 K279BI via KCFX-HD2.