| 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 |
|---|---|---|---|
| 217-368 | Greene | Greenfield, IL | Frontier North |
| 217-369 | Champaign | Champaign, IL | Cellco Partnership DBA Verizon Wireless |
| 217-370 | Morgan | Jacksonville, IL | New Cingular Wireless PCS |
| 217-371 | Morgan | Jacksonville, IL | New Cingular Wireless PCS |
| 217-372 | Champaign | Champaign, IL | Ameritech Illinois |
| 217-373 | Champaign | Champaign, IL | Ameritech Illinois |
| 217-374 | Greene | White Hall, IL | Frontier North |
| 217-375 | Vermilion | Rankin, IL | Frontier Communications Of The Carolinas, Inc |
| 217-376 | Logan | Emden, IL | Frontier Communications Of The Carolinas, Inc |
| 217-377 | Champaign | Champaign, IL | New Cingular Wireless PCS |
| 217-378 | Champaign | Champaign, IL | Ameritech Illinois |
| 217-379 | Ford | Paxton, IL | Frontier North |
| 217-380 | Logan | Lincoln, IL | Sprint Spectrum L.p. |
| 217-381 | Sangamon | Springfield, IL | Ameritech Illinois |
| 217-382 | Clark | Martinsville, IL | Odin Telephone Exchange |
| 217-383 | Champaign | Champaign, IL | Ameritech Illinois |
| 217-384 | Champaign | Champaign, IL | Ameritech Illinois |
| 217-385 | Edgar | Brocton, IL | Frontier North |
| 217-386 | Iroquois | Loda, IL | Frontier North |
| 217-387 | Iroquois | Thawville, IL | Frontier North |
There are 736 prefixes, In the code area, the major cities are Champaign, IL;Charleston, IL;Danville, IL;Decatur,. The major city is Chicago.