About ZIP code 94509
The ZIP code 94509 routes mail to Antioch in the California 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
94509 - Antioch
ZIP code 94509 is Antioch in California, United States.
| ZIP code | 94509 |
| Place | Antioch |
| Region | California |
| District | Contra Costa |
| Country | United States (US) |
| Coordinates | 37.9939, -121.8089 (map) |