| 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 |
|---|---|---|---|
| 636-674 | Barnhart | Jefferson | Landline |
| 636-651 | Saint Louis | Saint Louis | Landline |
| 636-376 | High Ridge | Jefferson | Landline |
| 636-487 | Saint Charles | Saint Charles | Landline |
| 636-549 | Eureka | Saint Louis | Landline |
| 636-474 | Saint Charles | Saint Charles | Landline |
| 636-300 | Saint Charles | Saint Charles | Landline |
| 636-825 | Valley Park | Saint Louis | Landline |
| 636-741 | Imperial | Jefferson | Landline |
| 636-212 | Arnold | Jefferson | Wireless |
| 636-627 | Saint Louis | Saint Louis | Landline |
| 636-346 | Saint Louis | Saint Louis | Wireless |
| 636-352 | Saint Charles | Saint Charles | Landline |
| 636-923 | Saint Louis | Saint Louis | Landline |
| 636-789 | Hillsboro | Jefferson | Landline |
| 636-447 | Saint Charles | Saint Charles | Landline |
| 636-486 | Saint Charles | Saint Charles | Landline |
| 636-940 | Saint Charles | Saint Charles | Landline |
| 636-465 | Festus | Jefferson | Landline |
| 636-328 | Saint Charles | Saint Charles | Landline |