Parcel Return Service, DC

ZIP code 56968 is a special-purpose postal code associated with Washington, D.C., not a conventional neighborhood with clearly defined residential boundaries. The surrounding federal core includes major landmarks such as the U.S. Capitol, the National Mall, the Washington Monument, and Smithsonian museums; the White House and National Archives are also nearby. Because 56968 is a unique-use ZIP code, public maps may not reliably show which landmarks fall within its postal boundary.