Parcel Return Service, DC

ZIP code 56950 is a special-use code associated with Washington, D.C., rather than a conventional neighborhood ZIP code with clearly defined public boundaries. As a result, no major landmark can be reliably identified as located within it. The White House, U.S. Capitol, Washington Monument, and Smithsonian museums are notable D.C. landmarks, but they should not be attributed to 56950 without a verified address-level match.