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American radio station company
Birach Broadcasting Corporation is a company based in Southfield, Michigan, USA, that owns several AM radio stations and, formerly, one low-power television (LPTV) station in the US. Many stations in the Birach portfolio run ethnic broadcasting. The company is wholly owned by its president and CEO Sima Birach.
WNZK broadcasts on 690 kHz during the daytime and on 680 kHz during the nighttime; it is the only radio station in North America licensed to operate on two different frequencies.