27MHz FCC Bandplan

The U.S. 27 MHz FCC bandplan used in Citizens' band radio assigns 40 numbered RF channels between 26.965 MHz (Channel 01) and 27.405 MHz (Channel 40), with channels generally spaced on a 10 kHz frequency raster[?].

There are odd 20 kHz channel spacings between channels 3 and 4, 7 and 8, 11 and 12,15 and 16 and 19 and 20. These 'unused' frequencies are used by remote controlled toys such as toy boats and toy cars. These frequencies can also be used by remote controlled aircraft[?] but are not recommended for use due to interference by CB radio in close proximity. For this reason model aircraft tend to use the 35 MHz band instead.

This assignment of channels to frequencies has been adopted by many countries worldwide, including the UK, although some countries have only approved the use of the first 22 channels.

The channel/frequency allocation for the 40 channels are as follows:

Channel Frequency

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
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
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
Channel 39 27.395 MHz
Channel 40 27.405 MHz

The frequency allocation list is supplied by the FCC (Federal Communications Commisiion) from Part 95 - Subpart D - Rules for CB Service Citizens Band (CB) Radio Service