About ZIP code 20428
The ZIP code 20428 routes mail to Washington in the District of Columbia region of United States. Use it as the postal segment of any address in this area, and confirm unusual addresses with the local postal operator.
United States ยท ZIP code
20428 - Washington
ZIP code 20428 is Washington in District of Columbia, United States.
| ZIP code | 20428 |
| Place | Washington |
| Region | District of Columbia |
| District | District of Columbia |
| Country | United States (US) |
| Coordinates | 38.8933, -77.0146 (map) |