Channel 4 originally signed on the air on December 24, 1953, as KOA-TV. It brought up NBC programming to Denver which prior to the station's launch, was temporarily discontinued. Founded by Metropolitan TV Company (partly owned by famed comedian Bob Hope, unrelated to a similarly-named company later known as Metromedia), owners of KOA radio (850 AM and 103.5 FM, now KRFX), channel 4 immediately assumed the NBC affiliation from KBTV (channel 9), due to KOA radio's longtime affiliation with and ownership by the Red Network.
1965–1968
1968–1970
In 1968, Metropolitan TV Company sold KOA-AM-TV to General Electric for $10 million. General Electric sold the KOA and KOAQ radio stations to A. H. Belo Corporation in 1983 for $22 million, as part of the company's overall exit from broadcasting.
1970–1976
1976–1977
This logo is similar to WTMJ-TV's bicentennial logo.
1977–1979
1979–1981
1981–1983
KCNC-TV
GE sold the KOA and KOAQ radio stations to Belo in 1983 for $22 million, as part of the company's overall exit from broadcasting. GE retained channel 4, but was required by FCC regulations at the time—which forbade TV and radio stations in the same city, but with different owners from sharing the same call letters—to change the station's call letters to KCNC-TV (standing for "Colorado's News Channel"), which it officially adopted on August 12 of that year.
1983–1993
KCNC retained its 1981 "circle 4" upon changing its callsign.
In 1986, General Electric acquired NBC, resulting in GE's return to broadcasting and KCNC becoming the first owned-and-operated station of a major network in the state of Colorado. By 1990, KCNC-TV devoted nearly all of its programming hours outside of network shows to locally produced news programs, broadcasting nearly 40 hours of newscasts each week.
1993–2003
The "4" is also shared with NBC's other O&Os on channel 4 since 1992.
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Launched:
September 10, 1995
On July 12, 1994, when CBS and Westinghouse Broadcasting agreed to a long-term affiliation deal that would result in three of its stations switch to the network; they initially intended on selling WCAU, but later discovered they would have to pay taxes on the profit of the transaction. To solve this problem, in November 1994, NBC decided to swap ownership of KCNC-TV and KUTV in Salt Lake City (which NBC had acquired the month before), along with the VHF channel 4 allocation and transmitter in Miami, to CBS in exchange for WCAU and the VHF channel 6 allocation and transmitter in Miami, which for legal purposes made the deal an even trade. The affiliation switch took place on September 10, 1995, sending the ABC affiliation to KMGH-TV and the NBC affiliation to KUSA.
1997–2003
Not long after then, in 1997, KCNC was rebranded as simply News 4, with the color scheme changed.
2003–present
In 2003, KCNC changed its on-air branding to "CBS 4" (the logo similar in style to that of Los Angeles sister duopoly of KCBS-TV/KCAL-TV) to comply with the network mandated branding conventions (although it retained the longtime News 4 title for its newscasts until 2005, when the newscasts were rebranded as CBS 4 News). With the change it reintroduced the CBS eye and abandoned its NBC-era "4".
Notes: 1Owned by Universidad de Chile (former owners of CHV), operating as a secondary channel. 2Local stations until 1993. 3Local version of the game show The Alphabet Game. 4Local version of The Voice, previously made by competitor Canal 13, under current license of ITV Studios. 5Under license of Fremantle. 6Under license of Venevisión. 7Under license of Cartoon Network (WarnerMedia). 8Co-production with Iguana Producciones. 9Under the licence of TVE. 10Under licence of Telefe. 11Alongside all the members of Anatel.
