About ZIP code 51003
The ZIP code 51003 routes mail to Alton in the Iowa 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
51003 - Alton
ZIP code 51003 is Alton in Iowa, United States.
| ZIP code | 51003 |
| Place | Alton |
| Region | Iowa |
| District | Sioux |
| Country | United States (US) |
| Coordinates | 42.9782, -96.0173 (map) |