Chicago Heights, Illinois: 1600KHz:
WCGO deleted permanently.
Actually, the station had a permit to move to 1020KHz at Jemison, Michigan near Grand Rapids. It also swapped callsigns with co-owned WONX-1590 Evanston, Illinois just before going silent. So if you want to look it up in FCC records, you'll have to be looking for "DWCGO" on 1020 in Michigan...
The station was deleted to allow the 1590 station in Evanston to increase daytime power to 7,000 watts.