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Although the original purpose for the number was for the Social Security Administration to track individuals, [1] the Social Security number has become a de facto national identification number for taxation and other purposes. [2] A Social Security number may be obtained by applying on Form SS-5, Application for a Social Security Number Card. [3]
Starting in 2011, the Social Security Administration opted to randomize Social Security number assignments. The most notable change is that the area number no longer has any geographic ...
A numbering plan area with multiple area codes is called an overlay. 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).
In the United States, the Social Security number (SSN) is a nine-digit number issued to U.S. citizens, permanent residents, and temporary (working) residents. Its purpose was to identify individuals for the purposes of Social Security, but it is now also used to track individuals for taxation purposes. There is no legal requirement to have a ...
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.
Some mobile telephone numbers from the 1990s assigned to communities in the area surrounding 617 (which is now the 781 area code) kept the 617 area code after the split. Area code 508 was split from 617 on July 16, 1988. Area code 978 subsequently split from 508 on September 1, 1997. Area code 781 was split from 617 on September 1, 1997.
By 2011, the 410/443 area was once again running out of numbers because of the continued proliferation of cell phones. To spare residents another number change to a new area code, a third overlay code, area code 667, was implemented on March 24, 2012. [5] This had the effect of assigning 24 million numbers to just over four million people.
Beginning in 2002, the military began a further effort to protect the use of social security numbers, even within the military itself. New regulations declared that on all but the most official of documents (such as a DD Form 214 or evaluation reports) social security numbers would only list the last four digits. Regulations also were enacted ...
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