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Area codes 405 and 572

From Wikipedia, the free encyclopedia

Area code 405 serves the U.S. state of Oklahoma. It covers the Oklahoma City Metropolitan Area including cities such as Oklahoma City, Edmond, El Reno, Norman, Stillwater, Shawnee, Chickasha, Tuttle, Moore, and Guthrie.

The other three area codes serving Oklahoma are 539 and 918, 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 the state that does not reach the state's borders with Arkansas, Missouri, Kansas, Colorado, New Mexico, and Texas.

Projections

Despite the rapid growth of the Oklahoma City metro area and the proliferation of auxiliary devices (cell phones and pagers), 405 remained unchanged for over a quarter century. As of October 2017, 405 was projected to exhaust by the second quarter of 2021. At that time, an all-service overlay of 405 was recommended, which the Oklahoma Corporation Commission approved.[1][2] On January 9, 2020 it was announced that area code 572 would overlay 405, making ten-digit dialing mandatory in central Oklahoma. The new area code will be assigned to new subscribers; anyone with an existing 405 number can keep it.[3] Permissive dialing began in October 2020, during which seven- and ten-digit dialing will be allowed. Ten-digit dialing will be mandatory in April 2021, and callers will hear recorded messages should they dial incorrectly. New numbers in the 572 area code will be available for assignment beginning May 24, 2021. 405 had been one of the few urbanized area codes without an overlay, making Oklahoma City one of the largest cities where seven-digit dialing was still possible.

References

  1. ^ "NRUF Reports" (PDF). NANPA Report (See Latest Report). Neustar, Inc. October 2017. Retrieved 2018-02-22.
  2. ^ https://www.news9.com/story/41141788/405-exhausted-okc-metro-to-get-new-area-code
  3. ^ Stecklein, Janelle. "Central Oklahoma adding 572 area code". Norman Transcript.

External links

Oklahoma area codes: 405, 539/918, 580
North: 580
West: 580 area code 405 East: 539/918
South: 580

This page was last edited on 7 February 2021, at 14:23
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