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The [http://www.fcc.gov Federal Communications Commission (FCC)] assigns frequencies and issues licenses to non-federal radio spectrum users. ...t users and maintains the Government Master File (GMF) database of federal frequencies and users. The GMF is not available to the public.

Spectrum is the distribution of [[wavelength|wavelengths]] and [[frequency|frequencies]]. ...often refer to a [[bandwidth]] of spectrum as a "band". These "bands" are frequencies that exist in a continuous range and usually have a common characteristic w