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Clickable map of Arizona area codes in blue (and border states) The U.S. state of Arizona is served by five telephone area codes in three numbering plan areas: Area codes 602, 480, and 623 serve the Phoenix metropolitan area. The three area codes were recombined in 2023 into an overlay complex after a 1999 split:
The three-way split took place even though, in actuality, just three million phone numbers had been issued in 602, less than half of the 7.5 million numbers available. [17] Permissive dialing of the new area codes started on April 1. [18] The three Valley area codes formed one of the largest local calling areas in the western United States.
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]
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The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits.
The university is requesting that the name be changed to Idaho Education Initiatives. The university formed the not-for-profit to purchase the University of Phoenix and all of its assets in a $550 ...
University of Phoenix [3] (UoPX) is a private for-profit university headquartered in Phoenix, Arizona. [ a ] Founded in 1976, the university confers certificates and degrees at the certificate , associate , bachelor's , master's , and doctoral degree levels.
The numbering plan area was created in a split of area code 520 on June 23, 2001, due mainly to population gains in Tucson, Yuma, and Flagstaff. Prior to October 2021, area code 928 had telephone numbers assigned for the central office code 988.