| District of Illinois area codes: 847 | |
|---|---|
| Country | United States |
| State/Province | Illinois |
| Major City | Chicago |
| Time Zone | Central |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 847-262 | Cook | Elk Grove Village, IL | Ameritech Illinois |
| 847-263 | Lake | Waukegan, IL | Ameritech Illinois |
| 847-264 | Dupage | Oak Brook, IL | AT&T Local |
| 847-265 | Lake | Lake Villa, IL | Ameritech Illinois |
| 847-266 | Lake | Highland Park, IL | Ameritech Illinois |
| 847-267 | Lake | Deerfield, IL | Ameritech Illinois |
| 847-268 | Cook | Park Ridge, IL | Ovation Communications Of Illinois |
| 847-269 | Cook | Summit Argo, IL | Cellco Partnership DBA Verizon Wireless |
| 847-270 | Lake | Round Lake, IL | Ameritech Illinois |
| 847-271 | Cook | Wheeling, IL | New Cingular Wireless PCS |
| 847-272 | Cook | Northbrook, IL | Ameritech Illinois |
| 847-273 | Cook | Elk Grove Village, IL | Mci Worldcom Communications |
| 847-274 | Cook | Northbrook, IL | New Cingular Wireless PCS |
| 847-275 | Cook | Palatine, IL | Sprint Spectrum L.p. |
| 847-276 | Lake | Libertyville, IL | Tds Metrocom Inc.-il |
| 847-277 | Lake | Barrington, IL | Ameritech Illinois |
| 847-278 | Dupage | Roselle, IL | Xo Illinois |
| 847-279 | Cook | Wheeling, IL | Ameritech Illinois |
| 847-280 | Dupage | Hinsdale, IL | New Cingular Wireless PCS |
| 847-281 | Lake | Libertyville, IL | Ovation Communications Of Illinois |
There are 783 prefixes, In the code area, the major cities are Algonquin, IL;Arlington Heights, IL;Buffalo Grove,. The major city is Chicago.