Illinois · Area code
Area Code 815Rockford, IL
Area code 815 is in Illinois, United States, and serves Rockford, Crystal Lake, Joliet, Plainfield and DeKalb and other places nearby. Its time zone is Central Time.
Area code 815 at a glance
- Area code
- 815
- Main place
- Rockford, IL
- State
- Illinois
- Country
- 🇺🇸 United States
- Country calling code
- +1
- Time zone
- Central Time (America/Chicago)
- Dial from abroad
- +1 815 XXX XXXX
- Dial inside the US and Canada
- 1 815 XXX XXXX
Cities and places in area code 815
The places phone numbers beginning 815 were issued in, the most common first.
- Rockford, IL
- Crystal Lake, IL
- Joliet, IL
- Plainfield, IL
- DeKalb, IL
- McHenry, IL
- Freeport, IL
- Lockport, IL
- Woodstock, IL
- Dixon, IL
- Frankfort, IL
- Morris, IL
- New Lenox, IL
- Ottawa, IL
- Peru, IL
- Princeton, IL
- Romeoville, IL
- Sterling, IL
- Belvidere, IL
- Galena, IL
- Mendota, IL
- Pontiac, IL
- Rochelle, IL
- Spring Valley, IL
- Streator, IL
- Sycamore, IL
- Wonder Lake, IL
- Amboy, IL
- Braidwood, IL
- Byron, IL
- Chenoa, IL
- Cissna Park, IL
- Clifton, IL
- Coal City, IL
- Durand, IL
- Dwight, IL
- Earlville, IL
- East Dubuque, IL
- Elizabeth, IL
- Elwood, IL
Look up a 815 number
Enter a full number with area code 815: it shows the line type, place, network and time zone, and every way to write it. Free and private.
Area code 815: frequently asked questions
Where is area code 815?
Area code 815 is in Illinois, United States. It serves places including Rockford, Crystal Lake, Joliet, Plainfield, DeKalb, McHenry, Freeport and Lockport.
What time zone is area code 815 in?
Area code 815 is on Central Time. A number with this area code can belong to someone living anywhere, so the time zone tells you where the number was issued rather than where the person is.
Which country is area code 815 in?
Area code 815 belongs to the United States, part of the North American Numbering Plan. Country code +1 is shared by the United States, Canada and many Caribbean and Pacific countries; the area code decides which one a number is in.
How do I call a 815 number from another country?
Dial your country's international access code (or press + on a mobile phone), then 1, then 815, then the seven-digit number: +1 815 followed by the number. Inside the United States and Canada, dial 1 and the ten digits.
Can I tell who is calling from an area code?
No. The area code only shows where a number was first issued. People keep their numbers when they move, mobile numbers work anywhere, and callers can disguise the number they call from. To see what the numbering plan says about a specific number, use the free phone number lookup.
What other area codes are in Illinois?
Other area codes in Illinois include 217, 224, 309, 312, 331, 447, 464, 618, 630 and 708.