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Citizens Band (CB) Radio
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Forty channels in the 26.96 - 27.41 MHz band are designated for use for CB radio, a mobile service regulated under Part 95 (Personal Radio) of the FCC's rules. CB radio is not unlicensed, but is rather "licensed by rule." CB radio is limited to 4 W transmitter output in AM mode and 12 W PEP output in SSB mode. CB radio is mostly used by truckers to pass along highway information, and by illegal high-power operators who attempt to communicate over distances of hundreds of km.
CB radio on 27 MHz was first created in 1958. The service was expanded in 1977 from its original 23 channels to its present 40 channels.
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Channelized Frequencies |
| Frequency | Bandwidth | Channel | Use | Service | Table |
| 26965 kHz | 10 kHz | 1 | CB channel 1 | Mobile | N |
| 26975 kHz | 10 kHz | 2 | CB channel 2 | Mobile | N |
| 26985 kHz | 10 kHz | 3 | CB channel 3 | Mobile | N |
| 27005 kHz | 10 kHz | 4 | CB channel 4 | Mobile | N |
| 27015 kHz | 10 kHz | 5 | CB channel 5 | Mobile | N |
| 27025 kHz | 10 kHz | 6 | CB channel 6 | Mobile | N |
| 27035 kHz | 10 kHz | 7 | CB channel 7 | Mobile | N |
| 27055 kHz | 10 kHz | 8 | CB channel 8 | Mobile | N |
| 27065 kHz | 10 kHz | 9 | CB channel 9 (emergency channel) | Mobile | N |
| 27075 kHz | 10 kHz | 10 | CB channel 10 | Mobile | N |
| 27085 kHz | 10 kHz | 11 | CB channel 11 | Mobile | N |
| 27105 kHz | 10 kHz | 12 | CB channel 12 | Mobile | N |
| 27115 kHz | 10 kHz | 13 | CB channel 13 | Mobile | N |
| 27125 kHz | 10 kHz | 14 | CB channel 14 | Mobile | N |
| 27135 kHz | 10 kHz | 15 | CB channel 15 | Mobile | N |
| 27155 kHz | 10 kHz | 16 | CB channel 16 | Mobile | N |
| 27165 kHz | 10 kHz | 17 | CB channel 17 | Mobile | N |
| 27175 kHz | 10 kHz | 18 | CB channel 18 | Mobile | N |
| 27185 kHz | 10 kHz | 19 | CB channel 19 (travel information channel; most heavily used channel) | Mobile | N |
| 27205 kHz | 10 kHz | 20 | CB channel 20 | Mobile | N |
| 27215 kHz | 10 kHz | 21 | CB channel 21 | Mobile | N |
| 27225 kHz | 10 kHz | 22 | CB channel 22 | Mobile | N |
| 27235 kHz | 10 kHz | 24 | CB channel 24 | Mobile | N |
| 27245 kHz | 10 kHz | 25 | CB channel 25 | Mobile | N |
| 27255 kHz | 10 kHz | 23 | CB channel 23 | Mobile | N |
| 27265 kHz | 10 kHz | 26 | CB channel 26 | Mobile | N |
| 27275 kHz | 10 kHz | 27 | CB channel 27 | Mobile | N |
| 27285 kHz | 10 kHz | 28 | CB channel 28 | Mobile | N |
| 27295 kHz | 10 kHz | 29 | CB channel 29 | Mobile | N |
| 27305 kHz | 10 kHz | 30 | CB channel 30 | Mobile | N |
| 27315 kHz | 10 kHz | 31 | CB channel 31 | Mobile | N |
| 27325 kHz | 10 kHz | 32 | CB channel 32 | Mobile | N |
| 27335 kHz | 10 kHz | 33 | CB channel 33 | Mobile | N |
| 27345 kHz | 10 kHz | 34 | CB channel 34 | Mobile | N |
| 27355 kHz | 10 kHz | 35 | CB channel 35 | Mobile | N |
| 27365 kHz | 10 kHz | 36 | CB channel 36 | Mobile | N |
| 27375 kHz | 10 kHz | 37 | CB channel 37 | Mobile | N |
| 27385 kHz | 10 kHz | 38 | CB channel 38 | Mobile | N |
| 27395 kHz | 10 kHz | 39 | CB channel 39 | Mobile | N |
| 27405 kHz | 10 kHz | 40 | CB channel 40 | Mobile | N |
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