The state of Oklahoma is served by the following area codes:
Areacode Yearcreated ParentNPA Overlay Numbering plan area 405 1947 – 405/572 Central Oklahoma, including Oklahoma City 572 2021 405 918 1953 405 539/918 Northeastern Oklahoma, including Tulsa 539 2011 918 580 1997 405 – Western and southern Oklahoma
See also List of North American Numbering Plan area codes Original North American area codes
References