Dewey, Oklahoma Area Code
Dewey, OK is officially utilizing an area code overlay in which area codes 539 and 918 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to Dewey, OK area code information read more about area codes 539 and 918 details and Oklahoma area codes.
Dewey, OK is located in Washington County and observes the Central Time Zone.
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