[http://en.wikipedia.org/wiki/Citizens'_band_radio#Channel_Assignments]
Channel Assignments
North American/CEPT channels CB Channel Frequency Typical Use (US)
Channel 01 26.965 MHz
Channel 02 26.975 MHz
Channel 03 26.985 MHz
Channel 04 27.005 MHz
Channel 05 27.015 MHz
Channel 06 27.025 MHz
Channel 07 27.035 MHz
Channel 08 27.055 MHz
Channel 09 27.065 MHz (emergency channel)
Channel 10 27.075 MHz
Channel 11 27.085 MHz
Channel 12 27.105 MHz
Channel 13 27.115 MHz
Channel 14 27.125 MHz
Channel 15 27.135 MHz
Channel 16 27.155 MHz
Channel 17 27.165 MHz
Channel 18 27.175 MHz
Channel 19 27.185 MHz (unofficial highway channel)
Channel 20 27.205 MHz
Channel 21 27.215 MHz
Channel 22 27.225 MHz
Channel 23 27.255 MHz
Channel 24 27.235 MHz
Channel 25 27.245 MHz
Channel 26 27.265 MHz
Channel 27 27.275 MHz
Channel 28 27.285 MHz
Channel 29 27.295 MHz
Channel 30 27.305 MHz
Channel 31 27.315 MHz
Channel 32 27.325 MHz
Channel 33 27.335 MHz
Channel 34 27.345 MHz
Channel 35 27.355 MHz
Channel 36 27.365 MHz
Channel 37 27.375 MHz
Channel 38 27.385 MHz (lsb, national calling frequency)
Channel 39 27.395 MHz
Channel 40 27.405 MHz