The CB Radio spectrum is broken up into 40 channels with CB frequencies ranging from 26.965 to 27.405 MHz. Channels are generally spaced 10 KHz apart. … CB Radio Frequencies and Channels. CB ChannelCB Frequency (MHz)Common Usage3827.385Open to everyone (and SSB, LSB)3927.395Open to everyone (and SSB)4027.405Open to everyone (and SSB)CB Radio Frequencies and Channels www.rightchannelradios.com › blogs › newsletters › cb-radio-frequencies-…