WSDZ is an AM

AM broadcasting

AM broadcasting is the process of radio broadcasting using amplitude modulation. AM was the first method of impressing sound on a radio signal and is still widely used today. Commercial and public AM broadcasting is carried out in the medium wave band world wide, and on long wave and short wave...

 radio station

Radio station

Radio broadcasting is a one-way wireless transmission over radio waves intended to reach a wide audience. Stations can be linked in radio networks to broadcast a common radio format, either in broadcast syndication or simulcast or both...

 in Belleville, Illinois

Belleville, Illinois

Belleville is a city in St. Clair County, Illinois, United States. As of the 2010 census, the city has a population of 44,478. It is the eighth-most populated city outside of the Chicago Metropolitan Area and the most populated city south of Springfield in the state of Illinois. It is the county...

, located at 1260 kHz. It is under ownership of The Walt Disney Company

The Walt Disney Company

The Walt Disney Company is the largest media conglomerate in the world in terms of revenue. Founded on October 16, 1923, by Walt and Roy Disney as the Disney Brothers Cartoon Studio, Walt Disney Productions established itself as a leader in the American animation industry before diversifying into...

 and features programming from Radio Disney

Radio Disney

Radio Disney is a radio network based in Burbank, California and headquartered out of the Disney Channel headquarters on West Alameda Ave., from where it has been based since November 2008. Prior to that, the network was based in Dallas, Texas...

. The station began in 1947 as WIBV ("Belleville's Voice"). WIBV aired various types of music, and broadcasting a variety of high school sports into the Metro-East

St. Louis, Missouri

St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St...

 area for many years, until the mid-1990s, when it became an all-news/talk station, a fore-runner of KTRS

KTRS (AM)

KTRS, located at 550 kHz, is an AM radio station in Maryland Heights, Missouri that carries a News/Talk format and is owned by the St. Louis Cardinals and CH Radio Holdings. It broadcasts with 5,000 watts of power during the day and 5,000 watts at night. The call letters KTRS stand for K Talk...

. WIBV became WSDZ, when it transferred all of its programming over to KSD-AM, which became KTRS in early-1997. Since then, it has been the Radio Disney affiliate for the Greater St. Louis

St. Louis, Missouri

St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St...

 Metropolitan area.

WSDZ along with KMOX-AM

KMOX (AM)

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...

 are responsible for activation of the St. Louis area Emergency Alert System

Emergency Alert System

The Emergency Alert System is a national warning system in the United States put into place on January 1, 1997, when it superseded the Emergency Broadcast System , which itself had superseded the CONELRAD System...

.