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Most current and detailed information for Illinois area codes and telephone prefixes / exchanges and associated cities and towns.
Contact Us. Please select your state and community from the menu below to find your closest Liberty walk-in location and local customer service & emergency phone numbers.
By Number: Our area code lookup makes it easy to find area codes in Illinois. Includes area code listings of all Illinois area codes with corresponding cities.
Area codes by City – 971 cities. Get a full list of Illinois area codes. Check out the area’s map, the current time, and area codes listed by city.
This is a list of the area codes in the state of Illinois and its numbering plan areas in the North American Numbering Plan. All NPAs within Illinois.
To find information on a specific area code, use the area code lookup that makes it easy to find an area code by number and gives detailed information including city/state, timezone, and area code maps.
There are two lists that Wirefly provides for the area codes in Illinois. The first table below shows the most populated cities in Illinois with the area codes listed next to them. The next table shows the all the Illinois state area codes by number with the names of the city they are used in.
