Area Code 815
| Area Code | 815 |
|---|---|
| Region | Rockford, DeKalb |
| In service since | 1947 |
| Overlaid with | 779 |
| Time zone | Central Time |
| Associated Places | 382 |
| States | Illinois Wisconsin |
| Regions | Boone County Bureau County Carroll County Cook County DeKalb County Ford County Grundy County Henry County Iroquois County Jo Daviess County Kane County Kankakee County Kendall County Lake County LaSalle County Lee County Lincoln County Livingston County Marshall County McHenry County McLean County Ogle County Putnam County Stephenson County Whiteside County Will County Winnebago County |
| Largest Place | Rockford |
| Smallest Place | Harmony |
382 locations are currently recorded for area code 815. The locations are in 2 federal states and 27 regions.
Places with the area code 815
The table lists all recorded locations for the area code 815 and shows the corresponding ZIP code, the location name, the County, and the State in each row.
Largest places with area code 815
The selection shows populous places that start with area code 815 or are directly assigned to this dialing region.
