KMOX is a radio station broadcasting from St. Louis, Missouri. It is a 50,000-watt clear channel radio station, which permits its nighttime signal to be heard in most of the continental U.S. KMOX operates as "NewsRadio 1120" and refers to itself as "The Voice of St. Louis."
KMOX is affiliated with the CBS Radio Network and licensed to a CBS Corporation subsidiary, CBS Radio. KMOX's transmitter is located in Pontoon Beach, Illinois. The KMOX studio is located at 1220 Olive Street. On June 14, 2012, KMOX announced it will move from its longstanding location at 1 Memorial Drive since 1968, to the Park Pacific Building at Olive Street and Tucker Blvd by the end of 2012 when its present lease expires. CBS Radio consolidated its two other radio stations KYKY and KEZK-FM there.
For many years, KMOX broadcast using C-QUAM AM stereo, but stereo transmissions ended in the spring of 2000. The station now broadcasts an HD Radio signal.
KMOX, along with WSDZ are responsible for the activation of the Greater St. Louis Emergency Alert System for hazardous weather, disaster declarations, etc.