About Area Code 815
Area code 815 serves Illinois, covering major cities including Rockford, Joliet. Operating in the Central Time (CT), this code was established in 1947.
| State | Time Zone | Cities |
|---|---|---|
| Illinois | Central Time (CT) | Rockford, Joliet |
Active Area Code
815
Illinois
Central Time (CT)
Est. 1947
PRIMARY
Location
Illinois
Rockford
ACTIVE
Coverage
2 Cities
Since 1947
Beware of Spam Calls
Scammers frequently use 815 numbers. Always verify unknown callers before sharing personal information.
Protect Yourself NowCommon Questions
Where is 815?
Located in Illinois, serving Rockford and surrounding areas.
What time zone?
Operates in Central Time (CT).
When established?
Area code 815 was introduced in 1947.
Used for spam?
Can be used by legitimate and fraudulent callers. Always verify unknown numbers.