KETK-TV, virtual channel 56 (UHF digital channel 22), is an NBC-affiliated television station serving Tyler and Longview, Texas, United States that is licensed to Jacksonville. The station is owned by the Nexstar Broadcasting Group; Nexstar also operates Fox affiliate KFXK-TV (channel 51) and MyNetworkTV affiliate KLPN-LD (channel 48) under a local marketing agreement with owner White Knight Broadcasting.