| 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 |
|---|---|---|---|
| 636-253 | High Ridge | Jefferson | Wireless |
| 636-200 | Saint Louis | Saint Louis | Landline |
| 636-288 | Saint Charles | Saint Charles | Wireless |
| 636-541 | Saint Charles | Saint Charles | Wireless |
| 636-229 | Saint Charles | Saint Charles | Landline |
| 636-556 | Bridgeton | Saint Louis | Landline |
| 636-928 | Saint Charles | Saint Charles | Landline |
| 636-798 | Defiance | Saint Charles | Landline |
| 636-532 | Chesterfield | Saint Louis | Landline |
| 636-368 | Chesterfield | Saint Louis | Landline |
| 636-677 | High Ridge | Jefferson | Landline |
| 636-236 | Saint Louis | Saint Louis | Wireless |
| 636-699 | Saint Louis | Saint Louis | Landline |
| 636-293 | Lake Saint Louis | Saint Charles | Wireless |
| 636-891 | Ballwin | Saint Louis | Landline |
| 636-533 | Fenton | Saint Louis | Landline |
| 636-898 | Chesterfield | Saint Louis | Landline |
| 636-679 | Wentzville | Saint Charles | Wireless |
| 636-449 | Saint Louis | Saint Louis | Landline |
| 636-393 | Labadie | Franklin | Landline |