| District of Illinois area codes: 217 | |
|---|---|
| Country | United States |
| State/Province | Illinois |
| Major City | Chicago |
| Time Zone | Central (UTC-06:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 217-200 | Macoupin | Carlinville, IL | Teleport Communications America |
| 217-201 | Macon | Decatur, IL | Sprint Spectrum L.p. |
| 217-202 | Champaign | Champaign, IL | Sprint Spectrum L.p. |
| 217-203 | Sangamon | Buffalo, IL | Sbc Internet Services |
| 217-204 | Morgan | Jacksonville, IL | Mci Worldcom Communications |
| 217-205 | Coles | Mattoon, IL | Consolidated Communications Enterprise Services-il |
| 217-206 | Sangamon | Springfield, IL | Ameritech Illinois |
| 217-207 | Champaign | Champaign, IL | Sbc Internet Services |
| 217-208 | Coles | Charleston, IL | Sprint Spectrum L.p. |
| 217-209 | Adams | Quincy, IL | Comcast Phone Of Illinois DBA Comco |
| 217-210 | Sangamon | Springfield, IL | Peerless Network Of Illinois |
| 217-212 | Vermilion | Fithian, IL | Sbc Internet Services |
| 217-213 | Vermilion | Danville, IL | Ameritech Illinois |
| 217-214 | Adams | Quincy, IL | Adams Telsystems |
| 217-215 | Champaign | Rantoul, IL | Level 3 Communications |
| 217-216 | Schuyler | Rushville, IL | Cellco Partnership DBA Verizon Wireless |
| 217-218 | Coles | Charleston, IL | Cellular Properties |
| 217-219 | Hancock | Carthage, IL | Cellco Partnership DBA Verizon Wireless |
| 217-220 | Sangamon | Springfield, IL | T-mobile Usa |
| 217-221 | Adams | Quincy, IL | Ameritech Illinois |
There are 736 prefixes, In the code area, the major cities are Champaign, IL;Charleston, IL;Danville, IL;Decatur,. The major city is Chicago.