Dulles covers roughly the southwestern third of Sterling, Virginia (another unincorporated community). The usage of Dulles as a community name began in the mid-1980s when Loudoun County economic development officer Pam Treadwell successfully lobbied[1] the United States 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 "recommended" city name is Sterling.[2] Dulles is also the city name for ZIP code 20189.[citation needed]
The addresses for shipping parcels to United States embassies and consulates, as well as their employees worldwide, are located in Dulles.[citation needed]
Northrop Grumman Innovation Systems has its headquarters on Warp Drive in Dulles.[3]AOL had its headquarters at 22000 AOL Way in Dulles.[4] In 2007, AOL announced that it would move its headquarters from Loudoun County to New York City, though it would continue to operate its Virginia offices.[5]
Dulles South Online is an online portal for Dulles Region businesses, organizations and residents to post news, information, listings and events concerning the Dulles South Region, focusing specifically on economic, public policy and community growth information.