WBBM (780 kHz) – branded Newsradio 105.9 WBBM – is a commercial all-news AM radio station licensed to serve Chicago, Illinois. Owned by Audacy, Inc., its studios are located at Two Prudential Plaza in the Chicago Loop, while the station transmitter—diplexed with sister station WSCR—resides in the nearby suburb of Bloomingdale. In addition to a standard analog transmission, WBBM broadcasts over HD Radio using the in-band on-channel standard, is simulcast over WCFS-FM (105.9), and is available online via Audacy.