| 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 |
|---|---|---|---|
| 618-342 | Villa Ridge | Pulaski | Landline |
| 618-467 | Alton | Madison | Landline |
| 618-797 | Granite City | Madison | Landline |
| 618-531 | Caseyville | Saint Clair | Wireless |
| 618-567 | Caseyville | Saint Clair | Wireless |
| 618-881 | Altamont | Effingham | Landline |
| 618-317 | Sparta | Randolph | Landline |
| 618-830 | Venice | Madison | Wireless |
| 618-388 | Olney | Richland | Landline |
| 618-243 | Okawville | Washington | Landline |
| 618-376 | Hardin | Calhoun | Landline |
| 618-610 | Venice | Madison | Wireless |
| 618-731 | Mount Vernon | Jefferson | Landline |
| 618-215 | Collinsville | Madison | Landline |
| 618-822 | Kell | Marion | Landline |
| 618-345 | Collinsville | Madison | Landline |
| 618-409 | Caseyville | Saint Clair | Wireless |
| 618-667 | Troy | Madison | Landline |
| 618-632 | O Fallon | Saint Clair | Landline |
| 618-202 | Anna | Union | Wireless |