Listen to the "WBBM Newsradio 780 AM & 105.9 FM" radio station live. The "WBBM Newsradio 780 AM & 105.9 FM" studio is located in Chicago, IL. Callsign: WBBM. Broadcasting region: signal provides at least grade B coverage to most of the northern two-thirds of Illinois (as far south as Springfield) as well as large portions of Wisconsin, Iowa, Michigan and Indiana. Its city-grade coverage reaches as far north as Milwaukee. At night, WBBM can be heard across much of North America under favorable conditions, but is strongest in the Midwest. Start of broadcasting: debut on the evening of February 6, 1924, transmitting on 1330 kHz. Program format: All-news radio, live rolling "news wheel" that begins at the top of each hour, structured into segments of news, traffic, weather, sports, and business updates from Bloomberg Radio. Target audience: 25-54 years old. Audience Reach: 9,618,502.