Find any 224- phone number in Illinois

The 224 area code is assigned to the North American Numbering Plan (NANP) area covering northeastern Illinois, which includes the city of Chicago and its suburbs. It includes parts of Cook County, Lake County, and McHenry County. The 224 area code is one of the two original area codes assigned to the state of Illinois in 1947 and was first assigned to the Chicago metropolitan area in 1989.

The North American Numbering Plan is a system of numerical telephone numbering used by the United States, Canada, and the Caribbean. It is managed by the NANPA, which divides the service area throughout the United States and its territories into regional numbering plan areas (NPA) that are assigned area codes. These area codes are used to identify telephone numbers used within each NPA for voice and other services. Each area code consists of three digits and the entire system consists of 10 area codes, each with seven possible digits combinations to be assigned to subscriber numbers. This allows over 9 million unique phone numbers to be available in each numbering plan area.