Area codes 847 and 224wikipedia
Area codes 847 and 224 are Illinois area codes covering northeastern Illinois and many northern suburbs of Chicago.
847847 & 224224847 and 224847, 224847/224224, 847area code 847area code 224847 / 224

List of North American Numbering Plan area codes

List of North American area codesNPAArea Codes
On January 5, 2002, area code 224 overlaid the 847 NPA and 10-digit dialing was implemented.

Area code 708

708area code 708
The main area code, 847, was created on January 20, 1996, in a three-way split from area code 708.
In 1996, area code 847 and area code 630 were broken off from 708.

Cook County, Illinois

Cook CountyCookCook counties
They serve most of Lake County, the northern part of Cook County, the northern part of Kane County, and a small part of McHenry County.