Learn about the 815 area code, including its location, cities, time zone, introduction date, and related area codes.
815 Area Code Details
Major Cities in the 815 Area Code
The 815 area code is associated with the following cities and communities:
- Belvidere
- Crystal Lake
- DeKalb
- Freeport
- Joliet
- Kankakee
- Loves Park
- Machesney Park
- McHenry
- Rockford
- Romeoville
- Woodstock
Where Is Area Code 815 Located?
The 815 area code serves communities in Illinois. The exact communities and numbering assignments can change as telephone numbering resources are updated.
815 Area Code Time Zone
The 815 area code is associated with the Central time zone.
When Was 815 Area Code Introduced?
The 815 area code was introduced in 01-Jan-1947.
How to Call a 815 Area Code Number
For a call within the same numbering plan, dial the required local number according to your carrier’s dialing rules. For calls from outside the United States, use the United States country code (+1), followed by the area code and seven-digit telephone number.
Related Area Codes
815 Area Code FAQ
What state is 815 area code in?
The 815 area code is associated with Illinois.
What time zone is 815 area code in?
The 815 area code is associated with Central.
What cities use 815 area code?
Belvidere|Crystal Lake|DeKalb|Freeport|Joliet|Kankakee|Loves Park|Machesney Park|McHenry|Rockford|Romeoville|Woodstock
More Questions About Area Code 815
What state is area code 815 in?
Area code 815 is associated with Illinois.
What time zone is area code 815 in?
The listed time zone for area code 815 is Central.