815 area code
Area code 815 is in Illinois, United States, in the Central time zone. It covers Belvidere, Crystal Lake, DeKalb, Freeport, Joliet, Kankakee and more.
State / Province
Illinois (IL)
Country
United States
Region
Midwest
Time zone
Central
Current local time
—
Approx. location
42.0509, -88.6227 ↗
How to dial a 815 number
- National format
- (815) 555-0100
- International (E.164)
- +1 815 555 0100
- From abroad
- +1 815 …
Cities & areas in the 815 area code
12 known locations — a selection:
Belvidere
Crystal Lake
DeKalb
Freeport
Joliet
Kankakee
Loves Park
Machesney Park
McHenry
Rockford
Romeoville
Woodstock
About area code 815
Area code 815 is one of the North American Numbering Plan (NANP) codes serving Illinois. In the NANP a full number looks like +1 (815) NXX-XXXX: the +1 is the country code for the US and Canada, 815 is the area code, and the remaining seven digits identify the specific line. A call is charged by your own carrier's plan, not by the area code itself.