Area code lookup
What area code is 815?
Here's everything about it.
Instant lookup for the 815 area code — location, time zone, cities served, and who's been calling from it. No sign-up, no app.
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Caller ID · NPA-NXX-XXXXLive
Area code
815
Location
Rockford / Joliet, IL
Local time
--:--:-- --
Rockford / Joliet
815 at a glance
SummaryState
Illinois
Time zone
Central (CT)
UTC offset
UTC−6 / −5 DST
Observes DST
Yes
Country
United States
Cities served by 815
Rockford / JolietRockford / Joliet
Where 815 sits on the map
No overlayCoverage area
About the 815 region
815 covers Rockford / Joliet in Illinois. It currently has no overlay code, so seven-digit dialing may still be possible within the region.
Who called me from 815?
Community reportsNo community reports for 815 numbers yet. Be the first to report one.
Got a call from 815 that isn't listed?
Frequently asked questions
FAQWhat area code is 815?+–
815 is a telephone area code serving Rockford / Joliet in Illinois, United States.
Where is area code 815 located?+–
It covers Rockford / Joliet in Illinois.
What time zone is 815?+–
815 observes Central (CT), which is UTC−6 / −5 DST and follows daylight saving time.
Can I get a 815 phone number?+–
Yes — most mobile carriers and VoIP providers let you request a 815 number regardless of where you physically live.