| District of Illinois area codes: 618 | |
|---|---|
| Country | United States |
| State/Province | Illinois |
| Major City | Belleville |
| Time Zone | Central (UTC-06:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 618-966 | White | Crossville, IL | Crossville Telephone Co. |
| 618-967 | Jackson | Carbondale, IL | Cellco Partnership DBA Verizon Wireless |
| 618-968 | White | Carmi, IL | Frontier North |
| 618-969 | Williamson | Marion, IL | Delta Comms DBA Clearwave Communications |
| 618-970 | Williamson | Pittsburg, IL | Aero Communications, Inc |
| 618-971 | Madison | Collinsville, IL | New Cingular Wireless PCS |
| 618-972 | Saint Clair | East Saint Louis, IL | Cellco Partnership DBA Verizon Wireless |
| 618-973 | Saint Clair | East Saint Louis, IL | Cellco Partnership DBA Verizon Wireless |
| 618-974 | Madison | Collinsville, IL | New Cingular Wireless PCS |
| 618-975 | Saint Clair | East Saint Louis, IL | Cellco Partnership DBA Verizon Wireless |
| 618-977 | Saint Clair | East Saint Louis, IL | Cellco Partnership DBA Verizon Wireless |
| 618-978 | Saint Clair | East Saint Louis, IL | Cellco Partnership DBA Verizon Wireless |
| 618-979 | Saint Clair | East Saint Louis, IL | Cellco Partnership DBA Verizon Wireless |
| 618-980 | Saint Clair | East Saint Louis, IL | Cellco Partnership DBA Verizon Wireless |
| 618-981 | Williamson | Carterville, IL | Aero Communications, Inc |
| 618-982 | Williamson | Pittsburg, IL | Frontier North |
| 618-983 | Williamson | Johnston City, IL | Frontier North |
| 618-984 | Franklin | Royalton, IL | Frontier North |
| 618-985 | Williamson | Carterville, IL | Frontier North |
| 618-986 | Franklin | Royalton, IL | Aero Communications, Inc |
There are 692 prefixes, In the code area, the major cities are Alton, IL;Belleville, IL;Carbondale, IL;Collinsvil. The major city is Belleville.