About ZIP code 19721
The ZIP code 19721 routes mail to New Castle in the Delaware 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
19721 - New Castle
ZIP code 19721 is New Castle in Delaware, United States.
| ZIP code | 19721 |
| Place | New Castle |
| Region | Delaware |
| District | New Castle |
| Country | United States (US) |
| Coordinates | 39.5645, -75.597 (map) |