| 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 |
|---|---|---|---|
| 217-974 | Champaign | Champaign, IL | Teleport Communications America |
| 217-975 | Coles | Mattoon, IL | Cellular Properties |
| 217-978 | Logan | Emden, IL | Level 3 Communications |
| 217-979 | Champaign | Champaign, IL | New Cingular Wireless PCS |
| 217-980 | Hancock | Nauvoo, IL | Mediacom Telephony Of Illinois |
| 217-982 | Pike | Pittsfield, IL | United States Cellular Corp. - Illinois |
| 217-983 | Greene | Eldred, IL | Frontier North |
| 217-984 | Logan | Middletown, IL | Level 3 Communications |
| 217-985 | Hancock | Sutter, IL | Adams Telephone Cooperative |
| 217-987 | Vermilion | Potomac, IL | Frontier Communications Of The Carolinas, Inc |
| 217-989 | Hancock | Dallas City, IL | Mediacom Telephony Of Illinois |
| 217-993 | Sangamon | Springfield, IL | Teleport Communications America |
| 217-994 | Effingham | Effingham, IL | Aero Communications, Inc |
| 217-997 | Cass | Arenzville, IL | Frontier Communications Of Midland |
| 217-999 | Macoupin | Mount Olive, IL | Citizens Telecom Co Illinois-frontier Citizens -il |
| 217-555 | Used in movie | Carlinville, IL | Used in movie |
There are 736 prefixes, In the code area, the major cities are Champaign, IL;Charleston, IL;Danville, IL;Decatur,. The major city is Chicago.