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602 was the original area code for Arizona, and was split in 1995 into 602, serving metropolitan Phoenix, and 520, serving the remainder of the state. [1] In 1999, 602 was split into 480, 602, and 623, [2] which were recombined in 2023. [3] 520 was split in 2001 to form area code 928. [4]
Area code 602 is the oldest area code in Arizona and was assigned in 1947 for the entire state. Under pressure from population growth and new telecommunications services, the numbering plan area (NPA) was reduced twice in five years in the 1990s. In 1995, the state outside metropolitan Phoenix was split off with area code 520.
It is necessary for most users of the CPT code (principally providers of services) to pay license fees for access to the code. [19] In the past, AMA offered a limited search of the CPT manual for personal, non-commercial use on its web site. [20] CPT codes can be looked up on the AAPC (American Academy of Professional Coders) website. [21]
More than 300 area codes exist in the United States alone which is a target-rich environment for phone scammers. The good news is that scam callers will often show up under common area codes for ...
Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
The largest telephone numbering plan in North American is the North American Numbering Plan (NANP), serving 25 regions or countries. Other countries maintain an autonomous numbering plan with distinct country codes within the international E.164 specifications by the International Telecommunication Union.
Area code 520 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Arizona. The numbering plan area comprises Tucson and most of the southeastern part of the state. Area code 520 was created in a split of area code 602 on March 19, 1995. Previously, 602 had been the sole area code for the entire state of ...
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