| District of Illinois area codes: 847 | |
|---|---|
| Country | United States |
| State/Province | Illinois |
| Major City | Chicago |
| Time Zone | Central |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 847-384 | Cook | Park Ridge, IL | Ameritech Illinois |
| 847-385 | Dupage | Bensenville, IL | Mcimetro Access Transmission Services LLC |
| 847-386 | Cook | Winnetka, IL | Teleport Communications America |
| 847-387 | Lake | Barrington, IL | Teleport Communications America |
| 847-388 | Lake | Mundelein, IL | Mcimetro Access Transmission Services LLC |
| 847-389 | Cook | Northbrook, IL | American Messaging (am) |
| 847-390 | Cook | Des Plaines, IL | Ameritech Illinois |
| 847-391 | Cook | Des Plaines, IL | Ameritech Illinois |
| 847-392 | Cook | Arlington Hts, IL | Ameritech Illinois |
| 847-393 | Lake | Mundelein, IL | Teleport Communications America |
| 847-394 | Cook | Arlington Hts, IL | Ameritech Illinois |
| 847-395 | Lake | Antioch, IL | Ameritech Illinois |
| 847-396 | Cook | Northbrook, IL | Ameritech Illinois |
| 847-397 | Cook | Palatine, IL | Ameritech Illinois |
| 847-398 | Cook | Arlington Hts, IL | Ameritech Illinois |
| 847-399 | Cook | La Grange Park, IL | Cellco Partnership DBA Verizon Wireless |
| 847-400 | Cook | Elk Grove Village, IL | Mci Worldcom Communications |
| 847-401 | Cook | Northbrook, IL | Sprint Spectrum L.p. |
| 847-402 | Cook | Northbrook, IL | Ameritech Illinois |
| 847-403 | Dupage | Bensenville, IL | Mcimetro Access Transmission Services LLC |
There are 783 prefixes, In the code area, the major cities are Algonquin, IL;Arlington Heights, IL;Buffalo Grove,. The major city is Chicago.