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The state of Oklahoma is served by the following area codes: 405/572: Central Oklahoma including Oklahoma City (original area code created in 1947; 572 added as overlay on April 24, 2021 [1] [2] [3] 580: Western and southern Oklahoma (split from 405 in 1997) 539/918: Northeastern Oklahoma including Tulsa (918 created in 1953 as split from 405 ...
Cancer Treatment Centers of America – Tulsa; Carl Albert Community Mental Health Center – McAlester Carnegie Tri-County Municipal Hospital – Carnegie, Oklahoma Cedar Ridge Hospital – Oklahoma City
1954: split to create area code 912; 1992: split to create area code 706; 1995: split to create area code 770; 1998: overlaid by 678; 405: Oklahoma (Oklahoma City, Stillwater, Edmond, Norman, Shawnee, and most of central Oklahoma) 1947: created for all of Oklahoma; 1953: split to create 918; 1997: split to create 580; 2021: overlaid by 572; 406 ...
The Children's Hospital at Saint Francis Tulsa: Oklahoma: 144 3 The Children's Hospital of Oklahoma: Oklahoma City: Oklahoma 246 Level I Pediatric 4 Doernbecher Children's Hospital: Portland: Oregon: 145 Level I Pediatric 3 5 Randall Children's Hospital at Legacy Emanuel: Portland Oregon 181 Level I Pediatric 3 Shriners Children's Portland ...
The implementation of an area code split typically involves the establishment of a Class-4 toll switching center for each division of the existing numbering plan area that receive a new area code. The local seven-digit telephone numbers in any of the areas are typically not changed.
Area code 918 was created in 1953 as a split from area code 405. Area code 539 was created as an overlay for 918. It became active on April 1, 2011 (although 539 numbers could have been assigned for activation before that date). Mandatory ten-digit dialing became effective on March 5, 2011. It is the first overlay in Oklahoma. [1] [2]
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List of Oklahoma area codes; 0–9. Area codes 405 and 572; Area code 580; Area codes 918 and 539