| District of Illinois area codes: 847 | |
|---|---|
| Country | United States |
| State/Province | Illinois |
| Major City | Chicago |
| Time Zone | Central |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 847-791 | Cook | Northbrook, IL | Sprint Spectrum L.p. |
| 847-792 | Kane | Hampshire, IL | Broadwing Communications |
| 847-793 | Lake | Half Day, IL | Ameritech Illinois |
| 847-794 | Cook | Schaumburg, IL | AT&T Local |
| 847-795 | Cook | Des Plaines, IL | Ameritech Illinois |
| 847-796 | Cook | Park Ridge, IL | Bandwidth.com Clec |
| 847-797 | Cook | Arlington Hts, IL | Ameritech Illinois |
| 847-798 | Cook | Bartlett, IL | Ameritech Illinois |
| 847-799 | Cook | Northbrook, IL | American Messaging (am) |
| 847-800 | Cook | Palatine, IL | Sprint Spectrum L.p. |
| 847-801 | Cook | Arlington Heights, IL | Broadwing Communications |
| 847-802 | Mchenry | Huntley, IL | Ameritech Illinois |
| 847-803 | Cook | Des Plaines, IL | Ameritech Illinois |
| 847-804 | Dupage | Roselle, IL | New Cingular Wireless PCS |
| 847-805 | Cook | Schaumburg, IL | Ovation Communications Of Illinois |
| 847-806 | Cook | Elk Grove Village, IL | Ameritech Illinois |
| 847-807 | Dupage | Roselle, IL | New Cingular Wireless PCS |
| 847-808 | Cook | Wheeling, IL | Ameritech Illinois |
| 847-809 | Lake | Barrington, IL | T-mobile Usa |
| 847-810 | Lake | Lake Forest, IL | Broadwing Communications |
There are 783 prefixes, In the code area, the major cities are Algonquin, IL;Arlington Heights, IL;Buffalo Grove,. The major city is Chicago.