Dekalb, IL Area Codes
Dekalb is served by area codes 779 and 815. It is in Illinois, DeKalb County. About 42,536 people live in its 1 ZIP codes.
| Field | Value |
|---|---|
| Area code(s) | 779, 815 |
| State / province | Illinois |
| County | DeKalb County |
| Population | 42,536 |
| ZIP codes | 1 |
| Time zone | Central |
| Coordinates | 41.9013, -88.7615 |
What area code is Dekalb in?
ZIP codes in the code footprint
Nearby towns and their area codes
Sycamore 779, 815Elburn 331, 630Rochelle 779, 815Hampshire 224, 847Sugar Grove 331, 630Sandwich 779, 815Plano 331, 630Geneva 331, 630
How to dial
Dial 779 + 7 digits for a number in Dekalb, or +1 779 ... from abroad. Ten-digit dialling is required everywhere in the North American Numbering Plan.