Illinois |
| Reverse Lookup - By States in US Illinois Reverse Lookup - US Area Codes. United States Telephones. |
| Dial codes in Illinois - How to dial in Illinois? How to dial to Illinois? |
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| Illinois IL |
| 312 Chicago |
| 773 Chicago |
| 630 Chicago suburbs |
| 847 Chicago suburbs |
| 708 NorthEast |
| 815 Northern |
| 224 |
| 331 |
| 464 overlay deferred- 872 overlay deferred- 217 South Central- 618 Southern |
| 779 |
| 779 |
| 309 West Central- |