| District of Illinois area codes: 847 | |
|---|---|
| Country | United States |
| State/Province | Illinois |
| Major City | Chicago |
| Time Zone | Central |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 847-303 | Cook | Palatine, IL | Ameritech Illinois |
| 847-304 | Lake | Barrington, IL | Ameritech Illinois |
| 847-305 | Cook | Arlington Hts, IL | Broadwing Communications |
| 847-306 | Dupage | Roselle, IL | New Cingular Wireless PCS |
| 847-307 | Lake | Lake Zurich, IL | Xo Illinois |
| 847-308 | Cook | La Grange Park, IL | Cellco Partnership DBA Verizon Wireless |
| 847-309 | Cook | Northbrook, IL | Cellco Partnership DBA Verizon Wireless |
| 847-310 | Dupage | Roselle, IL | Ameritech Illinois |
| 847-312 | Cook | Elk Grove Village, IL | T-mobile Usa |
| 847-313 | Cook | Northbrook, IL | Broadwing Communications |
| 847-314 | Kane | Elgin, IL | Usa Mobility Wireless |
| 847-315 | Cook | Northbrook, IL | Ameritech Illinois |
| 847-316 | Cook | Evanston, IL | Ameritech Illinois |
| 847-317 | Lake | Deerfield, IL | Ameritech Illinois |
| 847-318 | Cook | Park Ridge, IL | Ameritech Illinois |
| 847-319 | Cook | La Grange Park, IL | American Messaging (am) |
| 847-320 | Lake | Lake Zurich, IL | Mcimetro Access Transmission Services LLC |
| 847-321 | Cook | Des Plaines, IL | AT&T Local |
| 847-322 | Cook | Northbrook, IL | Sprint Spectrum L.p. |
| 847-323 | Cook | Northbrook, 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.