| District of Illinois area codes: 847 | |
|---|---|
| Country | United States |
| State/Province | Illinois |
| Major City | Chicago |
| Time Zone | Central |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 847-934 | Cook | Palatine, IL | Ameritech Illinois |
| 847-935 | Lake | Waukegan, IL | Ameritech Illinois |
| 847-936 | Lake | Waukegan, IL | Ameritech Illinois |
| 847-937 | Lake | Waukegan, IL | Ameritech Illinois |
| 847-938 | Lake | Waukegan, IL | Ameritech Illinois |
| 847-939 | Cook | Park Ridge, IL | First Communications LLC |
| 847-940 | Lake | Deerfield, IL | Ameritech Illinois |
| 847-941 | Cook | Wheeling, IL | Level 3 Communications |
| 847-942 | Cook | Arlington Heights, IL | Sprint Spectrum L.p. |
| 847-943 | Lake | Deerfield, IL | AT&T Local |
| 847-944 | Dupage | Roselle, IL | Ameritech Illinois |
| 847-945 | Lake | Deerfield, IL | Ameritech Illinois |
| 847-946 | Cook | Northbrook, IL | Cellco Partnership DBA Verizon Wireless |
| 847-947 | Cook | Schaumburg, IL | Teleport Communications America |
| 847-948 | Lake | Deerfield, IL | Ameritech Illinois |
| 847-949 | Lake | Mundelein, IL | Ameritech Illinois |
| 847-951 | Cook | Northbrook, IL | Cellco Partnership DBA Verizon Wireless |
| 847-952 | Cook | Elk Grove Village, IL | Ameritech Illinois |
| 847-953 | Cook | Des Plaines, IL | Ameritech Illinois |
| 847-954 | Cook | Des Plaines, IL | Xo 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.