Area Codes
| 847 | Illinois (Arlington Heights, Buffalo Grove, Wauconda, Waukegan, Des Plaines, northwest Chicago suburbs and northeastern Illinois, and is overlaid by 224) | More information at: Area Code 847 Phone Number Blocks
| 847 | Illinois (Arlington Heights, Buffalo Grove, Wauconda, Waukegan, Des Plaines, northwest Chicago suburbs and northeastern Illinois, and is overlaid by 224) | More information at: Area Code 847 Phone Number Blocks