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September 12, 2026Short & citedBlog
Civic Viewpoint.
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Kept by Bryan McAllister — short guides, clear facts, and the Canadian angle when it matters.
How It Works • Radio

CB radio

CB radio, short for citizens band radio, is a short-distance, two-way voice radio service used by the general public for personal or business communication.

Updated September 12, 20261 min readCited sources

CB radio, short for citizens band radio, is a short-distance two-way voice service for personal or business use. It operates on 40 channels in the 27 MHz band and typically does not require a licence.

What it is

CB radio is a land mobile radio system for short-distance one-to-many voice communication. It uses a transceiver and antenna and is distinct from amateur radio, FRS, GMRS, MURS, and similar services. For more on related topics, see Wiki.

Key details

In the United States, CB radio uses 40 channels between 26.965 MHz and 27.405 MHz. The service originated in the 1940s and was opened for hobby use in 1975. It has been used by truck drivers and in areas with limited telephone service.

Why it matters

CB radio provides a licence-free communication option for short-range needs. It is especially relevant in Canada for drivers and rural users. Unlike modern AI tools like ChatGPT and Copilot, CB radio is a simple radio service. It also differs from email services such as Microsoft Outlook, offering real-time voice communication.

In short

  • CB radio is for short-distance one-to-many voice communication.
  • It operates on 40 channels in the 27 MHz band.
  • No licence required in many countries.
  • Distinct from amateur radio and other services.
Canadian angle

CB radio is relevant in Canada because CB communications are also permitted there, making it a familiar short-range radio service for drivers, rural users, and hobbyists.

Quick questions

What does CB stand for?
CB stands for "citizens band."
How many CB channels are there?
In the United States, CB radio has 40 channels.
Do you need a licence for CB radio?
In many countries, no individual licence is required; in the United States, the FCC does not require an individual licence for CB operation.

Sources

  1. Federal Communications Commission — https://www.fcc.gov/wireless/bureau-divisions/mobility-division/citizens-band-radio-service-cbrs
    Supports: Official description of CBRS, 40 channels, frequency range, and no individual licence requirement in the United States.
  2. Encyclopaedia Britannica — https://www.britannica.com/technology/citizens-band-radio
    Supports: General definition, typical equipment, U.S. channels and power limits, historical origin, and mention of Canada as a country where CB communications are allowed.
  3. Wikipedia — https://en.wikipedia.org/wiki/Citizens_band_radio
    Supports: General definition of CB radio as a short-distance land mobile radio system and distinction from other personal radio services.
  4. Encyclopedia.com — https://www.encyclopedia.com/media/encyclopedias-almanacs-transcripts-and-maps/cb-radio
    Supports: General description of CB radio as a short-range mobile communication system.