Though the name Area 51 is used in official Central Intelligence Agency documentation, other names used for the facility include Dreamland, Paradise Ranch, Home Base, Watertown Strip, Groom Lake, and most recently Homey Airport. The area is part of the Nellis Military Operations Area, and the restricted airspace around the field is referred to as R- 4808N, known by the military pilots in the area as "The Box" or "the Container ".