Area codes 405 and 572

Area codes 405 and 572 serve the central part of the U.S. state of Oklahoma. They cover Oklahoma City and most of its suburbs, including Edmond, El Reno, Norman, Stillwater, Shawnee, Chickasha, Tuttle, Moore, and Guthrie.

The other three area codes serving Oklahoma are 918 and 539, which cover northeastern Oklahoma (including the city of Tulsa); and 580, which serves western and southern Oklahoma.

Area code 405 was one of the original area codes put into service in 1947 by telecom giant AT&T. Until January 1, 1953, it covered the entire state of Oklahoma. On that date, northeastern Oklahoma was assigned area code 918.

Even though central Oklahoma was home to the great majority of 405's landlines and cell phones, this configuration remained unchanged for 44 years. On November 1, 1997, 405 was reduced to cover only central Oklahoma, while the southern and western portions of the old 405 became area code 580. As a result, 405 is the only area code in Oklahoma that does not border another state.