Dulles, Virginia is an unincorporated area located in Loudoun County, Virginia, part of the Washington Metropolitan Area. The headquarters of Orbital Sciences Corporation, GeoEye, and ODIN technologies and the former headquarters of MCI Inc. and AOL are located in Dulles. Other companies have offices in Dulles, e.g. , Harris IT Services, a wholly owned subsidiary of Harris Corporation. Dulles covers roughly the southwestern third of Sterling, Virginia (another unincorporated community).