| List of Area Codes in Illinois | ||
|---|---|---|
| 217 Area Code | 224 Area Code | 309 Area Code |
| 312 Area Code | 618 Area Code | 708 Area Code |
| 773 Area Code | 847 Area Code | 872 Area Code |
| County List of Area Code 331 | ||
|---|---|---|
| DuPage Area code | Kane Area code | Cook Area code |
| Will Area code | Kendall Area code |
| County List of Area Code 630 | ||
|---|---|---|
| DuPage Area code | Kane Area code | Cook Area code |
| Will Area code | Kendall Area code |
