Parcel Return Service, DC

ZIP code 56983 is a unique, nonresidential postal code associated with Washington, D.C., rather than a conventional neighborhood with a clearly defined public boundary. No major landmark can therefore be reliably identified as being within the ZIP itself. The U.S. Capitol, White House, National Mall, and Smithsonian museums are prominent city landmarks, but available ZIP-level information does not establish that they fall within 56983.