WBBM

WBBM, 780 AM, is an all-news radio station located in Chicago, Illinois, United States. The station is owned by the CBS Radio division of CBS Corporation. The station's studios are located in the combined CBS Radio facility at Two Prudential Plaza in the Loop neighborhood, and its transmitter is located in Itasca. WBBM is a Class A station which broadcasts on a clear-channel AM frequency. Its daytime signal provides at least grade B coverage to large portions of Illinois, Wisconsin, Iowa, Michigan and Indiana and has been heard as far south as Cincinnati during the day, and city-grade coverage as far north as Milwaukee. At night, it covers much of the eastern half of North America, but is strongest in the Midwest. WBBM is an owned and operated station of the CBS Radio Network.