640 AM WMFN PEOTONE, IL

WMFN (640 AM) is a radio station broadcasting a Black-oriented news format from the Black Information Network (BIN). The station is owned by Birach Broadcasting Corporation, and under a local marketing agreement (LMA) with iHeartMedia, specifically its Chicago cluster.

Licensed to Peotone, Illinois, the station targets Chicago, specifically the city's South and West Sides, where most of the city's Black population resides. The station's transmitter site is northwest of the intersection of Interstate 57 and (Will/Kankakee) County Line Road south of Peotone.

Though the station in technicality serves the radio market of Will County seat Joliet, along with Morris and Crete, the station's schedule is completely automated with the master feed of BIN and its coverage area de facto serves Chicago and its suburbs, with occasional contributions from personalities from iHeart's WVAZ, WGRB, and WGCI-FM. The station is de facto a full-market satellite station of WVAZ's second HD Radio subchannel, which broadcast BIN before Birach and iHeartMedia entered into the LMA.