| District of Illinois area codes: 847 | |
|---|---|
| Country | United States |
| State/Province | Illinois |
| Major City | Chicago |
| Time Zone | Central |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 847-978 | Lake | Fox Lake, IL | Teleport Communications America |
| 847-979 | Cook | Arlington Heights, IL | Broadwing Communications |
| 847-980 | Cook | Wheeling, IL | Sprint Spectrum L.p. |
| 847-981 | Cook | Elk Grove Village, IL | Ameritech Illinois |
| 847-982 | Cook | Skokie, IL | Ameritech Illinois |
| 847-983 | Cook | Park Ridge, IL | Teleport Communications America |
| 847-984 | Lake | Libertyville, IL | Broadwing Communications |
| 847-985 | Dupage | Roselle, IL | Ameritech Illinois |
| 847-986 | Lake | Grayslake, IL | Tds Metrocom Inc.-il |
| 847-987 | Dupage | Roselle, IL | New Cingular Wireless PCS |
| 847-988 | Cook | La Grange Park, IL | Cellco Partnership DBA Verizon Wireless |
| 847-989 | Cook | Northbrook, IL | Cellco Partnership DBA Verizon Wireless |
| 847-990 | Lake | Libertyville, IL | Mci Worldcom Communications |
| 847-991 | Cook | Palatine, IL | Ameritech Illinois |
| 847-992 | Cook | Northbrook, IL | American Messaging (am) |
| 847-993 | Dupage | Wood Dale, IL | Xo Illinois |
| 847-994 | Cook | Park Ridge, IL | Global Crossing Local Services-il |
| 847-995 | Cook | Schaumburg, IL | Ameritech Illinois |
| 847-996 | Lake | Libertyville, IL | Tds Metrocom Inc.-il |
| 847-997 | Dupage | Roselle, IL | New Cingular Wireless PCS |
There are 783 prefixes, In the code area, the major cities are Algonquin, IL;Arlington Heights, IL;Buffalo Grove,. The major city is Chicago.