| District of Illinois area codes: 309 | |
|---|---|
| Country | United States |
| State/Province | Illinois |
| Major City | Peoria |
| Time Zone | Central (UTC-06:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 309-932 | Henry | Galva, IL | Frontier North |
| 309-933 | Rock Island | Moline, IL | Mediacom Telephony Of Illinois |
| 309-934 | Henry | Annawan, IL | Henry County Telephone Co. |
| 309-935 | Henry | Annawan, IL | Henry County Telephone Co. |
| 309-936 | Henry | Atkinson, IL | Henry County Telephone Co. |
| 309-937 | Henry | Cambridge, IL | Cambridge Telephone Co. |
| 309-938 | Tazewell | Morton, IL | Level 3 Communications |
| 309-944 | Henry | Geneseo, IL | Geneseo Telephone Co. |
| 309-945 | Henry | Geneseo, IL | Geneseo Telephone Co. |
| 309-946 | Henry | Geneseo, IL | Geneseo Telephone Co. |
| 309-948 | Rock Island | Rock Island, IL | Level 3 Communications |
| 309-949 | Henry | Colona, IL | Geneseo Telephone Co. |
| 309-955 | Knox | Wataga, IL | Mediacom Telephony Of Illinois |
| 309-961 | Mclean | Le Roy, IL | Bitwise Communications |
| 309-962 | Mclean | Le Roy, IL | Frontier North |
| 309-963 | Mclean | Danvers, IL | Frontier Communications Of Illinois |
| 309-964 | Woodford | Goodfield, IL | Bitwise Communications |
| 309-965 | Woodford | Goodfield, IL | Frontier Communications Of The Carolinas, Inc |
| 309-966 | Peoria | Peoria, IL | Comcast Phone Of Illinois DBA Comco |
| 309-968 | Mason | Manito, IL | Gallatin River Communications DBA Centurylink |
There are 634 prefixes, In the code area, the major cities are Bloomington, IL;East Moline, IL;East Peoria, IL;Ga. The major city is Peoria.