On April 5, 1948. Channel 9 signed on the air. On February 6, 1953. CBS moved the remainder of its programming to the rechristened WBBM-TV, On August 6, 1956. WGN-TV became an independent station when DuMont Television Network ceased operations.
The "9" in the 1993-2002 logo is also inverted into a "G" in the black bar with the "WGN" callsign; this logo was used by the national superstation feed of WGN-TV in promos and IDs until 1998, when only the "WGN" portion of the logo began to be used on the superstation feed.
When this logo was introduced in November 2002, the 1999–2006 version of The WB logo was originally placed next to the boxed "9" in the logo; when WGN affiliated with The CW (owned by CBS Corporation and the Warner Bros. Entertainment division of Time Warner, owners of UPN and The WB respectively, and initially featuring some of both networks' programming) in September 2006, the logo was updated to include The CW's logo. A variant without the box "9" and network logo was used on the national superstation feed until 2008, when Superstation WGN rebranded as WGN America; since then, WGN-TV and WGN America do not use similar branding schemes.
WGN disaffiliated from The CW on September 1, 2016, at which time the affiliation moved to MyNetworkTV owned-and-operated station WPWR-TV. This move made WGN an independent station for the first time in 21 years.
1Nexstar operates these stations owned by Mission Broadcasting. 2Nexstar operates this station owned by Cunningham Broadcasting. 3Nexstar operates this station owned by White Knight Broadcasting through an SSA. 4Nexstar operates this station owned by Vaughan Media. 5Predecessor company of LIN Media. 6Currently a repeater for WWLP. 7Owned by Super Towers, Inc., Nexstar operates this station through a SSA; sale of station to Mission Broadcasting pending FCC approval. 8Joint venture with Discovery, Inc., in which Nexstar owns 31% while Discovery owns the remaining 69%.