Bull Valley, Illinois Area Code
Bull Valley, 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 Bull Valley, IL area code information read more about area codes 779 and 815 details and Illinois area codes.
Bull Valley, IL is located in McHenry County and observes the Central Time Zone.
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