Area Code 815 — Illinois

Q: What time zone is area code 815?

Area code 815 is in the Central Time zone (Central Time).

Active General Purpose Code Overlay United States

Area code 815 is located in Illinois and operates on Central Time . The largest city served is Rockford .

Coverage Area

Area code 815 — Illinois

Area Code Details

Area Code: 815
State / Province: Illinois (IL)
Country: United States
Time Zone: Central Time Central Time
Local Time Now: —
Status: Active
Code Type: General Purpose Code
In Service Since: January 1, 1947
Assigned: January 1, 1947
Population Served: ~504,727 est.
Overlay Complex: 779/815

Cities Served

Largest City Rockford

Rockford Joliet McHenry New Lenox Woodstock Lockport Ottawa Dixon Sterling Minooka La Salle Harvard Manhattan Poplar Grove Marseilles Morrison Cherry Valley Elwood Rock Cut La Moille

History & Relationships

New codes split from 815

779 Illinois

Overlay complex — shares geography with

779 Illinois

Rate Centers & Exchanges

27 rate centers identified within area code 815

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Other Area Codes in Illinois

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Nearby Area Codes

Frequently Asked Questions About Area Code 815

What state is area code 815?

Area code 815 is located in Illinois, United States.

Where is area code 815 from?

Area code 815 originates from Illinois. It operates in the Central Time zone.

What time zone is area code 815?

Area code 815 falls within the Central Time zone (Central Time).

What cities are in area code 815?

Area code 815 serves cities including Rockford, Joliet, McHenry, New Lenox, Woodstock, Lockport, Ottawa, Dixon, and more.

Is a call from area code 815 a scam?

Area code 815 is a legitimate general purpose code area code serving Illinois. Like any area code, individual numbers using 815 can be used for scam calls — always verify the specific number if you receive an unexpected or suspicious call.