| General Information about Area Code 618 | |
|---|---|
| Country | United States |
| State / Province / Territory | Illinois |
| Major City | Belleville |
| Time Zone | Central (UTC-06:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 618-526 | Breese | Clinton | Landline |
| 618-437 | Ina | Jefferson | Landline |
| 618-644 | Saint Jacob | Madison | Landline |
| 618-901 | Ullin | Pulaski | Landline |
| 618-983 | Johnston City | Williamson | Landline |
| 618-307 | Collinsville | Madison | Landline |
| 618-726 | O Fallon | Saint Clair | Landline |
| 618-209 | Harrisburg | Saline | Landline |
| 618-836 | Shipman | Macoupin | Landline |
| 618-942 | Herrin | Williamson | Landline |
| 618-455 | Willow Hill | Jasper | Landline |
| 618-886 | Creal Springs | Williamson | Landline |
| 618-357 | Pinckneyville | Perry | Landline |
| 618-973 | Venice | Madison | Wireless |
| 618-671 | Collinsville | Madison | Landline |
| 618-272 | Ridgway | Gallatin | Landline |
| 618-627 | Thompsonville | Franklin | Landline |
| 618-254 | Wood River | Madison | Landline |
| 618-259 | Wood River | Madison | Landline |
| 618-877 | Granite City | Madison | Landline |