| 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 |
|---|---|---|---|
| 636-668 | Winfield | Lincoln | Landline |
| 636-583 | Union | Franklin | Landline |
| 636-597 | Truxton | Lincoln | Landline |
| 636-791 | Wright City | Warren | Landline |
| 636-745 | Wright City | Warren | Landline |
| 636-642 | Imperial | Jefferson | Landline |
| 636-528 | Troy | Lincoln | Landline |
| 636-697 | Saint Louis | Saint Louis | Landline |
| 636-577 | Saint Peters | Saint Charles | Wireless |
| 636-537 | Chesterfield | Saint Louis | Landline |
| 636-438 | Ballwin | Saint Louis | Landline |
| 636-695 | O Fallon | Saint Charles | Landline |
| 636-295 | Troy | Lincoln | Wireless |
| 636-234 | Union | Franklin | Landline |
| 636-278 | Saint Peters | Saint Charles | Landline |
| 636-875 | Saint Peters | Saint Charles | Landline |
| 636-379 | Lake Saint Louis | Saint Charles | Landline |
| 636-452 | Hillsboro | Jefferson | Landline |
| 636-946 | Saint Charles | Saint Charles | Landline |
| 636-787 | Chesterfield | Saint Louis | Landline |