Washington, DC

ZIP code 20426 belongs to the U.S. Department of State in Washington, D.C. This ZIP code is primarily known for housing the headquarters of the Department of State, which oversees the country's foreign affairs and diplomacy. The Harry S. Truman Building, the main building of the Department, is a prominent landmark in the area. The ZIP code is located in the Foggy Bottom neighborhood, near the White House and other significant government buildings.