Wikipedia
KNBN
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.
KNBN can also be seen on translators KKRA-LP on UHF channel 24 and K40GS-D on UHF channel 40; both stations are licensed in Rapid City, though K40GS-D mainly serves Lead and the Black Hills region.