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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 ...
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
A telephone prefix is the first set of digits after the country, and area codes of a telephone number. In the North American Numbering Plan countries (country code 1), it is the first three digits of a seven-digit local phone number, the second three digits of the 3-3-4 scheme. In other countries, both the prefix and the number may have ...
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.
Users can switch carriers while keeping number and prefix (so prefixes are not tightly coupled to a specific carrier). 7 Claro 8: Instituto Costarricense de Electricidad (Kölbi) Croatia +385: 91: 9: A1 Hrvatska: Due to Mobile number portability the prefix of an existing number does not determine the carrier. Any new number will follow the ...
split of 405 and to give Oklahoma two area codes, one centered on Oklahoma City and the other centered on Tulsa; 2011: overlaid by 539; 919: North Carolina (the Research Triangle, including Raleigh, the state capital city; Durham, Cary, and Chapel Hill; and Goldsboro and other parts of north-central North Carolina) 1954
Area codes 903 and 430 are telephone area codes in the North American Numbering Plan (NANP) for the northeastern part of the U.S. state of Texas, including Kilgore, Texarkana, Tyler, and Sherman. The numbering plan area begins just north and east of the Dallas–Fort Worth metroplex , and extends to the Oklahoma, Arkansas, and Louisiana state ...
A few towns and suburbs on US state boundaries have one central office which serves both sides, using different prefixes in different area codes. [8] All South Coffeyville, Oklahoma exchange prefixes are served from Coffeyville, Kansas, population 10000; [9] [10] the two are local to each other but long distance to everything else.