Area code 618 is located in southern Illinois. It covers most of the southern part of the state, including Belleville and Granite City. Illinois Counties within Area Code 618: St. Clair, Madison, Williamson, Jackson, Franklin, Marion, Jefferson, Clinton, Randolph, Monroe, Saline, Jersey, Perry, Crawford, Fayette, Union, Lawrence, Wayne, Richland, Bond, Massac, Washington, Macoupin, White, Clay,…

The area code 464 was put into service as an all services overlay of area code 708 on January 21, 2022. The 464 area code serves southern suburbs of Chicago this includes the largest cities Berwyn,  Blue Island, Burbank, Calumet City, Chicago Heights and more. Illinois Counties within Area Code 464: Cook, and parts of…

Area Code 447 is in Illinois, and it was officially put into service as an overlay of area code 217 on February 27, 2021. This area code serves the central Illinois, including the cities of Champaign, Danville, Charleston, Decatur, Quincy, Springfield and Urbana. Illinois Counties within Area Code 447: Adams, Bond, Brown, Cass, Champaign, Christian,…

The 331 Area Code was first put into service on October 7, 2007. It was an overlay for 630 area codes and served the same area. The 331 Area Code is located in Illinois. The code covers Aurora, Naperville, Bolingbrook and surrounding areas. It is also an overlay for area code 630. Illinois Counties within…

Area code 312 is a Chicago-based area code. It was created in 1947, making it one of the earliest area codes in the United States. Illinois Counties within Area Code 312: Cook Illinois Major Cities within Area Code 312: Chicago Area Code 312 Time Zone? Central time zone is also known as America/Chicago.

The 224 area code covers northeastern Illinois, including Elgin, Waukegan, Arlington Heights and more. Illinois Counties within Area Code 224: Cook, Lake, Kane, McHenry. Illinois Major Cities within Area Code 224: Elgin, Waukegan, Arlington Heights, Evanston, Schaumburg, Palatine, Skokie, Des Plaines, Mount Prospect, Hoffman Estates, Glenview, Buffalo Grove, Carpentersville, Wheeling, Park Ridge, Northbrook, Elk Grove…

Area code 217 is located in central Illinois, covering Springfield, Champaign, and Decatur. Illinois Counties within Area Code 217: Champaign, Sangamon, Macon, Vermilion, Adams, Coles, Morgan, Christian, Macoupin, Logan, Montgomery, Effingham, Shelby, Hancock, Douglas, Edgar, Piatt, Pike, Clark, Moultrie, De Witt, Cass, Menard, Greene, Cumberland, Ford, Brown, Scott, Schuyler, Mason, Fayette, Iroquois, Bond, Jasper, Calhoun,…

Area code 309 is located in Illinois, and it covers the cities of Peoria, Bloomington, and Normal. Illinois Counties within Area Code 309: Peoria, McLean, Rock Island, Tazewell, Knox, Henry, Woodford, Fulton, McDonough, Warren, Mercer, Marshall, Mason, Whiteside, Bureau, Henderson, Stark, Schuyler, De Witt, Putnam. Illinois Major Cities within Area Code 309: Peoria, Bloomington, Normal,…

Area code 681 is located in the state of West Virginia. This area code was assigned to service locations in the state of Virginia by the North American Numbering Plan Administration (NANPA). West Virginia Counties within Area Code 681: Kanawha, Berkeley, Cabell, Monongalia, Wood, Raleigh, Harrison, Mercer, Marion, Putnam, Jefferson, Fayette, Ohio, Wayne, Logan, Greenbrier,…

The 304 area code is located in West Virginia. It covers the cities of Charleston, Huntington, Charleston Heights and more. If you’re looking to call a friend in 304, but don’t know their area code, you can use our search engine to look up the proper number. Just type in the city you are trying…