WOCK-CD is a class A MundoMax-affiliated television station located in Chicago, Illinois, United States. It is owned by KM Communications, and transmits on VHF channel 4. The transmitter is located on the John Hancock Tower. Additionally, WOCK's main signal is also carried by Fox Television Stations on WPWR-TV over their 50.3 digital subchannel, both to provide a full-power over-the-air signal of MundoFox to the market and to address the weaknesses of transmitting in the low VHF band digitally.