Dulles, Virginia Postal Service to allow Sterling businesses and residents to use Dulles as an alternative address. The USPS defines Dulles as an "acceptable" city name for the 20166 zip code, whose "actual" city name is Sterling. The addresses for shipping parcels to United States embassies and consulates, as well as their employees worldwide, are located in Dulles. The USPS city name for zipcode 20189 is Dulles. Washington Dulles International Airport is located partially in Dulles (although its postal address uses the Sterling name instead) and partially in Fairfax County. The community derives its name from the airport; the airport in turn
Norfolk International Airport which it is categorized as a small-hub primary commercial service facility. As per Federal Aviation Administration records, the airport had 1,606,695 enplanements in calendar year 2011, a decrease of 3.4 percent from 1,663,294 in 2010. , Norfolk International was ranked as the 70th-busiest airport in the United States and the fourth-busiest in Virginia in terms of passengers served annually following Richmond International, Dulles International Airport and Reagan National Airport. Southwest Airlines, Delta Air Lines, and American Airlines are the predominant users of the airport. Norfolk International Airport covers an area of 1,300 acres (526 ha) at an elevation of 27