CB Radio Channel Frequencies and Handheld Range

Use the cb radio channel frequencies below to select any of the 40 standard CB channels, which occupy the 26.965–27.405 MHz portion of the cb radio band. Channel numbers do not follow a perfectly uninterrupted 10 kHz sequence because several frequency slots were omitted from the original channel plan.

A handheld CB can communicate beyond a building or across open ground, but its practical range depends more on antenna performance, height, terrain, and shielding than on its advertised power rating. A stock handheld-to-handheld link often covers about 0.5–2 miles in ordinary conditions; obstructions can reduce that distance, while high, open ground can extend it to several miles.

What are the 40 CB radio channel frequencies from 26.965 to 27.405 MHz?

These are the standard North American CB channel assignments. Frequencies are shown in megahertz (MHz).

Channel 1: 26.965 MHz
Channel 2: 26.975 MHz
Channel 3: 26.985 MHz
Channel 4: 27.005 MHz
Channel 5: 27.015 MHz
Channel 6: 27.025 MHz
Channel 7: 27.035 MHz
Channel 8: 27.055 MHz
Channel 9: 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

Why does a long range handheld CB radio have limited range?

A long range handheld CB radio is limited mainly by its antenna and position. CB transmissions use wavelengths of roughly 11 meters, so a practical quarter-wave antenna is about 2.7 meters long. A handheld cannot carry an antenna that size; its short whip or loaded antenna is a compromise that radiates less efficiently.

CB equipment is also constrained by limited transmitter power. A typical handheld operates at the same general CB power level as a mobile unit, but extra power cannot compensate fully for a poor antenna. The radio is also close to the user’s body, which absorbs or detunes some of the signal. Holding it inside a vehicle is worse: the metal body can shield the antenna and block the intended radiation pattern.

For a better chance of contact, keep the handheld upright, hold it away from your body, and move toward an open or elevated position. In a city, dense trees, concrete buildings, hills, and parked vehicles may reduce a usable link to a few blocks or less. On open, level ground, two properly positioned handhelds may reach a mile or more, but that is not a guaranteed rating.

How does the CB radio band interact with terrain and propagation?

At local distances, CB communication is primarily affected by line of sight and ground-wave behavior. Antenna height matters because raising both antennas improves the radio horizon and reduces blockage from ridges, buildings, and vegetation. A hill between two radios can stop communication even when the distance is short.

Orientation also matters. Most CB antennas are vertically polarized, so both radios should be held or mounted vertically. A horizontal or badly tilted antenna can lose signal strength. Wet foliage, heavy rain, and nearby power equipment may add attenuation or noise.

The 27 MHz band can also support ionospheric, or “skip,” propagation under favorable conditions. This may produce distant stations hundreds or thousands of miles away, but it does not make a local handheld link dependable. Skip can instead increase interference and cover nearby signals with stronger distant transmissions.

How do handheld, mobile, and base antennas improve a link?

A stock handheld antenna is the least efficient option because it is short, close to the operator, and usually lacks a substantial ground plane. A vehicle-mounted CB improves performance by using a longer whip, a better counterpoise from the vehicle body, and a position above some local obstructions. A roof or high fender mount generally performs better than an antenna buried beside the vehicle body.

A base station can use a full-sized or loaded outdoor antenna mounted higher above ground. Height and a clear installation usually provide a larger improvement than simply choosing a radio with a higher power claim. The feed line, connectors, and antenna tuning also matter; excessive standing-wave ratio (SWR) wastes power and can stress the transmitter.

If a handheld includes a manufacturer-approved external-antenna connection, attaching it to a suitable vehicle or elevated antenna can substantially improve a link. Use the antenna’s required mount and coax, keep the antenna vertical, and test the installation for acceptable SWR. If the handheld has only a fixed antenna, replacing or modifying it is unlikely to produce a predictable improvement.

Interference Zones