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In the United States of America, the Social Security Number (or simply SSN) is the standard identifier used by virtually all government and private institutions. Each SSN is unique and is assigned to only one person. When a person dies his SSN will never re-register to another.
The nine-digit SSN has three parts: 123 - 45 - 6789
The first three digits indicate the area number.
The next two digits indicate the group number.
The last four are a unique serial number.
Area number
The terrain number is determined by the geographic location of the region. Prior to 1972, numbered cards were issued by local social security offices throughout the United States and the area number indicated the state where the SSN card was issued. But it often turned out that the issuing state was not the state of main residence, because in those days a person could get a number at absolutely any office of the Social Insurance Department, regardless of where he lived. Since 1972, when the function of assigning numbers moved from territorial offices to one, centralized, to this day located in Baltimore (Maryland), area numbers began to be determined depending on the ZIP code, part of the mailing address of any citizen. But the postal address may not always coincide with the place of residence, therefore, both before and after 1972,
Typically, terrain numbers were assigned starting from the northeast and gradually transitioning to the west. Those. people living on the east coast have lower number values, while those living on the west coast, on the contrary, have higher numbers.
Note: it should be borne in mind that such an assignment scheme began to operate in 1936, i.e. before the era of universal computerization. And with the advent of computers, the Social Security Department in Baltimore preferred to organize the states not from east to west, but in alphabetical order, but completely eradicating the old system was quite laborious, so there is still no absolutely accurate systematization of area numbers ...
Area number table:
The same numbers, used more than once, either moved from one state to another over time, or are numbers designating an area located in different geographic zones of the country. SSN starting with 000 is never correct!
Group number
The group number does not directly depend on the place of residence. It can take values from 01 to 99 inclusive. For administrative reasons, the first group of numbers consisted of odd numbers ranging from 1 to 9 (01, 03 ... 09) and even numbers ranging from 10 to 98. Subsequently, the remaining even numbers from 2 to 8 and odd numbers from 11 to 99 were introduced.
Also, each locality has its own maximum group number. The group number changes only after all the area numbers have been used. For example, if it is known that for the area 999, at the moment the maximum group number is 72 (interval from 10 to 98), then it is obvious that the type number 999-04-1234 is not correct, since 72 and 04 belong to different spaces, with the space including 04 being introduced after the space including 72.
Continuously updated information on maximum group numbers for specific locations can be found at: http://www.ssa.gov/foia/highgroup.htm
It is sometimes rumored that group numbers are assigned according to racial differences, but this is a deep misconception.
Batch number
The series number (the last 4 digits of the SSN) can take values from 0001 to 9999 and is assigned in the usual order of priority for each group and for each locality separately. The number 0000 was never used. Until 1965, series numbers were assigned in a somewhat strange order, but at the moment, all numbers are strictly in ascending order.
Links in the topic:
SSN check - http://www.searchbug.com/peoplefinder/ssn.asp
Search for a person by name - https://www.searchbug.com/
