Holiday Hills, Illinois Area Code

Holiday Hills, IL is officially utilizing an area code overlay in which area codes 779 and 815 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.

In addition to Holiday Hills, IL area code information read more about area codes 779 and 815 details and Illinois area codes.

Holiday Hills, IL is located in McHenry County and observes the Central Time Zone.
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