The United States Frequency Allocations: The Radio Spectrum Chart was updated in September 2025, using data as of March 2025. The United States Frequency Allocation Chart is provided here as a …

Disclaimer: The Table of Frequency Allocations as published by the Federal Register and codified in the Code of Federal Regulations remains the legal source material.

This chart represents a graphic single-point-in-time portrayal of the Table of Frequency Allocations used in the United States

The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources.

6 days ago · The exact use that can be made of any given frequency or frequency band (e.g., channeling plans, allowable emissions, etc.) is given in the FCC Rule part (s) so indicated.

May 18, 2025 · Every legal, regulated signal in the U.S. — from cell towers to military radar — is assigned a specific frequency range. Learning to read this chart can help you:

Feb 6, 2023 · This crazy, beautiful chart illustrates the incredible complexity of managing one of our nation’s most crucial – and invisible – national assets: the radio spectrum.

The frequency allocation chart indicates the activity code for each allocation, as denoted by a colored band below the allocation. The legend for activity code is found on the left side of the chart.

Display a text equivalent version of the US Frequency Allocation Chart (tagged Adobe Acrobat format). Read Background Paper on Radio Frequency Spectrum Allocations in the US.

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