KNBN, channel 21, is the NBC affiliate in Rapid City, South Dakota. It is owned by Jim Simpson's Rapid Broadcasting, and is also the sister station to KWBH-LP. KNBN's transmitter is located in Rapid City.
The station signed on the air on May 14, 2000. Despite transmitting its signal on UHF channel 21, KNBN identifies as NewsCenter1 on-air, an artifact of when the main cable systems in the market carried the station on Channel 1, which is usually used solely to provide a slot for video on demand services, barker channels or electronic program guide services. Currently, KNBN is carried on local cable systems on channel 10, though it retains the NewsCenter1 branding. Before KNBN signed on, NBC was provided via cable from KUSA in Denver- before that, KEVN served as the primary NBC station in the area.
The station's digital signal is multiplexed:
|Channel||Video||Aspect||PSIP Short Name||Programming|
|21.1||1080i||16:9||KNBN-NBC||Main KNBN programming / NBC|
|21.2||720p||KNBN-CW||Simulcast of KWBH-LP|
KNBN shut down its analog signal, over UHF channel 21, on February 1, 2009, and "flash-cut" its digital signal into operation UHF channel 21. Because it was granted an original construction permit after the FCC finalized the DTV allotment plan on April 27, 1997, the station did not receive a companion channel for a digital television station.