Reference

Radio Frequencies

FRS, GMRS, MURS, CB, NOAA weather, ham bands, aviation, and AM/FM — frequencies, services, and power limits.

Common radio frequencies and bands

This reference gathers the frequencies most people actually need — family radios, weather alerts, CB, marine and aviation, and the amateur (ham) bands — in one place, along with whether a license is required to transmit.

The main services

  • FRS — the license-free walkie-talkie channels that bubble-pack radios use.
  • GMRS — shares channels with FRS but allows higher power and repeaters; in the US it requires an FCC license (no exam).
  • MURS — five license-free VHF channels.
  • CB — 40 channels, no license, with channel 19 the traditional highway channel.
  • NOAA weather — seven receive-only channels carrying continuous forecasts and alerts.
  • Ham — the amateur bands, which require a license earned by exam and open up far more spectrum and power.

Using the tool

Browse a band to see its channels and frequencies. It's useful for programming a handheld, finding the local weather channel, or checking which service fits what you're trying to do before you buy a radio.

Common question

Do I need a license?

In the US, FRS, MURS, and CB are license-free. GMRS requires an inexpensive FCC license that covers your whole family, and ham radio requires passing an exam. Rules vary by country, so check your local regulator.