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KMOX

KMOX
Logo-kmox.jpg
City St. Louis, Missouri
Broadcast area Greater St. Louis
Branding NewsRadio 1120
Slogan "The Voice of St. Louis"
Frequency 1120 kHz AM (HD Radio)
Repeater(s) 102.5–3 FM KEZK-FM HD3
First air date December 24, 1925
Format News/Talk
Language(s) English
Power 50,000 watts
Class A (Clear channel)
Facility ID 9638
Transmitter coordinates 38°43′22″N 90°3′19″W / 38.72278°N 90.05528°W / 38.72278; -90.05528 (main antenna)
38°43′24″N 90°3′12″W / 38.72333°N 90.05333°W / 38.72333; -90.05333 (auxiliary antenna)
Callsign meaning none officially, but a local legend claims it stands for Kirkwood, MissOuri and X-mas (as the station launched on Christmas Eve)
Affiliations CBS Radio Network
WestwoodOne
KMOV 4 (CBS)
Owner CBS Radio
(sale to Entercom pending)
(CBS Radio East Inc.)
Sister stations KEZK-FM, KYKY
Webcast Listen Live
Website CBSStL.com

KMOX (1120 kHz) is an AM 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 central U.S. and into Mexico and Canada. 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 in the Park Pacific Building at Olive Street and Tucker Boulevard. CBS Radio also has studios and offices there for its two other St. Louis radio stations, KYKY (Y98) and 102.5 KEZK-FM.

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. The Federal Communications Commission requires a digital (hybrid) license for HD broadcasting.

KMOX, along with WSDZ, are responsible for the activation of the Greater St. Louis Emergency Alert System for hazardous weather, disaster declarations, etc.

KMOX was started in the early days of broadcasting by a group of businessmen incorporated as The Voice of St. Louis Inc. According to the station's official website, the "KMOX" call letters were assigned by the Federal Radio Commission. The station's owners had hoped to be assigned "KVSL", for "Voice of St. Louis." The owners also applied for "KMO" (with MO the abbreviation for Missouri), but those call letters had been in use by KMO in Tacoma since 1922. KMOX signed on December 24, 1925. The "X" was added because the starting date was Christmas Eve, or "X"mas eve. Although a local legend states the call letters mean Kirkwood, Missouri On Xmas, the K was the assigned first call letter of all new radio stations west of the Mississippi River.


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