Airspace Classifications

Airspace

100

The largest class of Airspace

Class A

200

Airspace from the surface to 4000ft

Class C Airspace

300

Airspace from the surface to 10,000ft

Class B Airspace

400

Large amount of the Airspace over the United states is classified as this

Class E Airspace

500

Restricted areas are areas where operations are hazardous to nonparticipating aircraft

Restricted Airspace

Airspace 2

100

Airspace that extends to FL 600 (Flight level 600)

Class A Airspace

200

Controlled airspace not classified as Class A, B, C, or D

Class E Airspace

300

The portion of the airspace that has not been designated as Class A, B, C, D, or E.

Class G Airspace

400

Designation for airspace in which certain activities must be confined, or where limitations may be imposed on aircraft operations that are not part of those activities. 

Special Use Airspace

500

All operations in this airspace is conducted under instrument flight rules (IFR).

Class A Airspace

Airspace 3

100

Airspace from surface to 2500ft

Class D Airspace

200

Unless otherwise authorized, each aircraft must establish two-way radio communications with the ATC facility providing air traffic services prior to entering the airspace

Class D Airspace

300

Examples of these areas include Camp David and the National Mall in Washington, D.C., where the White House and the Congressional buildings are located

Prohibited Areas

400

 These areas are published in the Federal Register and are depicted on aeronautical charts

Prohibited Areas

500

 Activities within these areas must be confined because of their nature, or limitations may be imposed upon aircraft operations that are not a part of those activities, or both.

Restricted Areas