Oswego, IL Area Codes
Oswego is served by area codes 331 and 630. It is in Illinois, Kendall County. About 43,047 people live in its 1 ZIP codes.
| Field | Value |
|---|---|
| Area code(s) | 331, 630 |
| State / province | Illinois |
| County | Kendall County |
| Population | 43,047 |
| ZIP codes | 1 |
| Time zone | Central |
| Coordinates | 41.6683, -88.3229 |
What area code is Oswego in?
ZIP codes in the code footprint
Nearby towns and their area codes
Montgomery 331, 630Plainfield 779, 815Yorkville 331, 630Aurora 331, 630North Aurora 331, 630Sugar Grove 331, 630Plano 331, 630Naperville 331, 630
How to dial
Dial 331 + 7 digits for a number in Oswego, or +1 331 ... from abroad. Ten-digit dialling is required everywhere in the North American Numbering Plan.