Illinois Area Codes
The Prairie State
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Illinois Area Codes
16 codesMajor Cities in Illinois
About Illinois Phone Numbers
Illinois, known as "The Prairie State", is located in the Midwest region of the United States with a population of approximately 12,812,508 residents. The state capital is Springfield, while the largest city is Chicago. Illinois operates in the Central (CT) timezone and covers 57,914 square miles.
Phone numbers in Illinois are assigned across 16 different area codes, including 217, 224, 309, 312, 331 and more. Major cities like Chicago, Aurora, Joliet, Naperville each have their own area code coverage.
If you receive calls from Illinois area codes, use our free phone lookup tool to identify the caller. You can check if a number has been reported as spam, find carrier information, and see community reports from other users who received calls from the same number.
State sovereignty, national union- State Motto of Illinois
Frequently Asked Questions
Illinois has 16 area codes: 217, 224, 309, 312, 331, 447, 464, 618, 630, 708, 730, 773, 779, 815, 847, 872. These area codes cover the entire state, including major cities like Chicago, Aurora, Joliet.
Illinois operates in the Central (CT) timezone. When calling Illinois phone numbers, consider the time difference to avoid calling at inappropriate hours.
Use our free phone number lookup tool to check if a Illinois number has been reported as spam. Simply enter the phone number in the search box above to see community reports, spam ratings, and caller information.
Illinois has a population of approximately 12,812,508 residents, making it one of the most populous states in the United States.