Area Codes:

Prefix County
312-301-XXXX Dupage
312-304-XXXX Dupage
312-314-XXXX Dupage
312-352-XXXX Dupage
312-510-XXXX Dupage
312-531-XXXX Dupage
312-699-XXXX Dupage
312-749-XXXX Dupage
312-816-XXXX Dupage
312-844-XXXX Dupage
312-990-XXXX Dupage
630-207-XXXX Dupage
630-209-XXXX Dupage
630-214-XXXX Dupage
630-230-XXXX Dupage
630-242-XXXX Dupage
630-247-XXXX Dupage
630-272-XXXX Dupage
630-280-XXXX Dupage
630-286-XXXX Dupage
630-320-XXXX Dupage
630-321-XXXX Dupage
630-323-XXXX Dupage
630-325-XXXX Dupage
630-408-XXXX Dupage
630-413-XXXX Dupage
630-418-XXXX Dupage
630-455-XXXX Dupage
630-468-XXXX Dupage
630-484-XXXX Dupage
630-522-XXXX Dupage
630-528-XXXX Dupage
630-537-XXXX Dupage
630-560-XXXX Dupage
630-570-XXXX Dupage
630-590-XXXX Dupage
630-601-XXXX Dupage
630-632-XXXX Dupage
630-642-XXXX Dupage
630-654-XXXX Dupage
630-655-XXXX Dupage
630-686-XXXX Dupage
630-703-XXXX Dupage
630-706-XXXX Dupage
630-716-XXXX Dupage
630-734-XXXX Dupage
630-789-XXXX Dupage
630-794-XXXX Dupage
630-819-XXXX Dupage
630-822-XXXX Dupage
630-828-XXXX Dupage
630-850-XXXX Dupage
630-856-XXXX Dupage
630-861-XXXX Dupage
630-887-XXXX Dupage
630-908-XXXX Dupage
630-915-XXXX Dupage
630-920-XXXX Dupage
630-974-XXXX Dupage
630-986-XXXX Dupage
708-256-XXXX Dupage
708-285-XXXX Dupage
708-519-XXXX Dupage
708-581-XXXX Dupage
708-912-XXXX Dupage
847-209-XXXX
847-280-XXXX
847-408-XXXX
847-528-XXXX
847-560-XXXX
847-601-XXXX
847-642-XXXX
847-703-XXXX
847-819-XXXX
847-822-XXXX
847-828-XXXX