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101 postal codes
| Postal codes | Towns | Places |
|---|---|---|
| 63146 | St. Louis 9 | 9 |
| 63147 | St. Louis 4 | 4 |
| 63301 | St Charles 39 | 39 |
| 63303 | St Charles 17 | 17 |
| 63386 | West Alton 13 | 13 |
This list is built from addresses of places already on this site. It is not a complete official directory.