| General Information about Area Code 636 | |
|---|---|
| Country | United States |
| State / Province / Territory | Missouri |
| Major City | St. Charles |
| Time Zone | Central (UTC-06:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 636-467 | Imperial | Jefferson | Landline |
| 636-238 | Ballwin | Saint Louis | Landline |
| 636-851 | Saint Charles | Saint Charles | Landline |
| 636-364 | Saint Clair | Franklin | Landline |
| 636-255 | Saint Charles | Saint Charles | Landline |
| 636-439 | O Fallon | Saint Charles | Wireless |
| 636-754 | Saint Charles | Saint Charles | Landline |
| 636-349 | Fenton | Saint Louis | Landline |
| 636-496 | Fenton | Saint Louis | Landline |
| 636-661 | Old Monroe | Lincoln | Landline |
| 636-634 | Bridgeton | Saint Louis | Landline |
| 636-896 | Saint Charles | Saint Charles | Landline |
| 636-263 | Saint Charles | Saint Charles | Landline |
| 636-730 | Chesterfield | Saint Louis | Landline |
| 636-398 | Foristell | Saint Charles | Landline |
| 636-594 | Ballwin | Saint Louis | Landline |
| 636-628 | Bridgeton | Saint Louis | Landline |
| 636-222 | Cedar Hill | Jefferson | Wireless |
| 636-757 | Saint Louis | Saint Louis | Landline |
| 636-273 | Grover | Saint Louis | Landline |