Henryetta, OK utilizes an area code overlay in which area codes 539 and 918 serve the same geographic area. The area code overlay was put into service on April 1, 2011 at which time area code 539 was created as an overlay of area code 918. Ten digit dialing (area code + seven digit number) is necessary because two different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.
In addition to Henryetta, OK area codes 539 and 918 serve northeastern Oklahoma including the Tulsa metropolitian area and its surrounding suburbs including the larger cities and communities of Bixbey, Bartlesville, Broken Arrow, Collinsville, Glenpool, Henryetta, Jenks, Muskogee, Owasso, Sand Springs, Sapulpa and Tulsa in addition to many smaller communities within the service area.
Henryetta, OK is located in Okmulgee County and observes the Central Time Zone.
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