 Having undergone heavy suburbanization since 1990, Loudoun has a full-fledged service economy.It is home to world headquarters for several Internet-related and high tech companies, including Verizon Business, Telos Corporation, Orbital Sciences Corporation, and Paxfire.Like Fairfax County's Dulles Corridor, Loudoun County has economically benefited from the existence of Washington Dulles International Airport, the majority of which is in the county along its border with Fairfax.