||This article needs additional citations for verification. (December 2010)|
|City of license||St. Louis, Missouri|
|Broadcast area||Greater St. Louis|
|Slogan||"The Voice of St. Louis"|
|Frequency||1120 kHz AM (HD Radio)|
|Repeaters||102.5–3 FM KEZK-FM HD3|
|First air date||December 24, 1925|
|Class||A (Clear channel)|
|Callsign meaning||none officially, but a local legend claims it stands for Kirkwood,i MissOuri and X-mas (as the station launched on Christmas Eve)|
|Affiliations||CBS Radio Network|
(CBS Radio East, Inc.)
|Sister stations||KEZK-FM, KYKY|
KMOX (1120 AM, "NewsRadio 1120") 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 (Y98) and KEZK-FM (Fresh 102.5) there. 
KMOX signed on in 1925 owned 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 "K-V-S-L", for "Voice of St. Louis" They were assigned KMOX, but in a last-ditch effort they applied for "K-M-O", but the letters had been in use by KMO in Tacoma since 1922. KMOX signed on December 24, 1925. (The "X" was because the 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.
In 1927, the station gave prominent coverage to the Charles Lindbergh flight across the Atlantic, in the Spirit of St. Louis. That same year, it became one of the first 16 stations in the CBS network; two years later CBS bought KMOX, and began the process of getting approval to build a 50,000-watt transmitter tower; when completed, it gave the now-clear-channel station a signal that could be heard as far away as New Zealand and the Arctic Circle, making it one of the first international radio stations. As of 2009–2010, its signal can be picked up in Scotland and South Africa.
During the 1930s and 1940s, KMOX was one of several St. Louis stations broadcasting Cardinals and Browns baseball games. KMOX lost broadcasting rights in 1948 when a new Cardinals radio network was formed by the team, but by the 1950s, it became the flagship station of that network (in part due to its clear channel status).
During the 1950s, the station's slogan was "k-mocks", pronouncing the way the station's call letters are spelled.
In 1955 Robert Hyland Jr became KMOX's general manager, a role he held for nearly forty years. It was Hyland who emphasized and leveraged KMOX's relationship with the Cardinals; he also made the decision in 1960 to eliminate the station's afternoon music programming in favor of talk radio, a critical change which led to the station's subsequent dominance of the St. Louis radio market. On February 29 of that year, Jack Buck hosted the first "At Your Service" program, which included an interview with Eleanor Roosevelt. That program, like the sports talk programs that soon followed, pioneered a format for radio heavily dependent on interviews, guest appearances, and calls from listeners.
After Hyland died in 1992, Rod Zimmerman was named general manager. He departed in 1998 to manage WBBM Radio in Chicago. Karen Carroll was general manager from 1998 until 2003, when Tom Langmyer was promoted to the top position. Langmyer left in 2005 to become vice president/general manager of WGN Radio in Chicago. Dave Ervin managed the station from 2005 to 2008. John Sheehan, who also oversees sister stations KEZK and KYKY is the station's current Market Manager for CBS.
On August 1, 2008; CBS Radio has announced that it would sell 50 radio stations in 12 markets to focus more on major market stations. Although CBS hasn't mentioned which stations are for sale, CBS has announced on the day of first-round bids (September 22, 2008) that KMOX will not be on the auction block.
The station's emphasis had shifted away from broadcasting St. Louis professional sports teams. In 2000, the St. Louis Blues hockey team moved to KTRS after having been on KMOX for all but two of the team's 33 seasons (1967–1999), but it would return starting in the 2007–08 season. In 2006, the Cardinals' broadcasts moved to KTRS 550 AM after 52 seasons on KMOX (1954–2005) after the team purchased controlling interest in KTRS.
On September 1, 2010, the Cardinals announced the return of broadcasts to KMOX, starting in the 2011 baseball season.
On January 30, 2012, Jon Grayson's "Overnight America", already heard on KMOX, WCCO and KDKA became a nationally syndicated program with over 20 stations across the country on board already.
KMOX has had a long history of broadcasting sports. In 1926, it broadcast the Cardinals-Yankees World Series, and starting the next season the station was regularly carrying Cardinals' games. KMOX's most famous sports figure was Jack Buck, who was the station's year-round sports director during the years he was also calling baseball and football for the CBS radio and television networks. Another famous figure was Harry Caray, who did play-by-play for Cardinals' baseball from 1945 through 1969. Bob Costas did play-by-play on KMOX for the Spirits of St. Louis of the American Basketball Association from 1974 until the ABA-NBA merger in June 1976.
The station continues to host sports programming such as "Sports on a Sunday Morning" with host Ron Jacober, and "Sports Open Line." St. Louis Cardinals broadcaster Dan McLaughlin, Tom Ackerman, Ron Jacober, and Kevin Wheeler host "Sports Open Line", which airs every weekday night.
While the station was known nationally for sports play-by-play, KMOX is best known in St. Louis for its format of news and talk. The station offers news, weather and traffic updates throughout the day. KMOX held the distinction of holding the record for consecutive number one Arbitron ratings books in the United States. The station was consistently the number one radio station with listeners 12 and older since 1972: however, in 2010 music station WARH (106.5 FM) took over the top spot in the Arbs.
For the past eleven Decembers, KMOX has hosted a holiday radio program, in which KMOX personalities perform an old-time radio show in front of a live audience.
Notable current and past KMOX broadcasters include:
Here you can share your comments or contribute with more information, content, resources or links about this topic.