Social Security Numbers (SSN) Reference Guide

Social Security Numbers (SSN) Reference Guide

About Social Security Numbers

In the United States, a Social Security number (or SSN) is a number issued to U.S. citizens, permanent residents, and people that are temporarily working in the country. The number is issued to an individual by the Social Security Administration, an agency of the federal government. Its primary purpose is tracking working individuals for taxation purposes and to track Social Security benefits. In recent years, the SSN has become a de facto national identification number, even though it is not supposed to be used as a form of identification.

There is no law directly requiring a natural born United States citizen to apply for a Social Security number, or SSN, to live or work in the United States.  Although some people still live without a Social Security number, it is becoming ever increasingly difficult to engage in normal acts of commerce or banking activities without providing an SSN. Such prohibitions against persons that refuse to enter into what amounts to a voluntary government program, raises a variety of constitutional concerns.

Since 1972, social security numbers have been issued by the central office of the  Social Security Administration. The first three (3) digits of a person’s social security number are determined by the ZIP Code of the mailing address shown on the application for a social security number.

Prior to 1972, social security numbers were assigned by Social Security Administration field offices.  The number merely established that his/her card was issued by one of the Social Security Administration offices in that State.

Social Security Number – Area Group Serial

The Social Security number consists of nine (9) digits – 1 2 3 – 4 5 – 6 7 8 9. The first three digits of a social security number denote the area (or State) where the application for an original Social Security number was filed.

Within each area, the group number (middle two (2) digits) range from 01 to 99 but are not assigned in consecutive order. For administrative reasons, group numbers issued first consist of the ODD numbers from 01 through 09 and then EVEN numbers from 10 through 98, within each area number allocated to a State. After all numbers in group 98 of a particular area have been issued, the EVEN Groups 02 through 08 are used, followed by ODD Groups 11 through 99.

Within each group, the serial numbers (last four (4) digits) run consecutively from 0001 through 9999.

This chart below shows how Group numbers are assigned:

  • ODD – 01, 03, 05, 07, 09——EVEN – 10 to 98<
  • EVEN – 02, 04, 06, 08——ODD – 11 to 99

List of Social Security Numbers for Each State

Follow is a list of social security numbers for each state.  The listing is organized in ascending order based on the SSN prefix, with the corresponding issuing state listed.

SSN Prefix Issuing State SSN Prefix Issuing State
001-003 New Hampshire 478-485 Iowa
004-007 Maine 486-500 Missouri
008-009 Vermont 501-502 North Dakota
010-034 Massachusetts 503-504 South Dakota
035-039 Rhode Island 505-508 Nebraska
040-049 Connecticut 509-515 Kansas
050-134 New York 516-517 Montana
135-158 New Jersey 518-519 Idaho
159-211 Pennsylvania 520 Wyoming
212-220 Maryland 521-524 Colorado
211-222 Delaware 525 New Mexico
223-231 Virginia 526 Arizona
232 North Carolina 526 New Mexico
232 West Virginia 527 Arizona
233-236 West Virginia 528-529 Utah
237-246 North Carolina 530 Nevada
247-251 South Carolina 531-539 Washington
252-260 Georgia 540-544 Oregon
261-267 Florida (Also 589-595) 545-573 California
268-302 Ohio 574 Alaska
303-317 Indiana 575-576 Hawaii
318-361 Illinois 577-579 District of Columbia
362-386 Michigan 580 Virgin Islands
387-399 Wisconsin 580-584 Puerto Rico
400-407 Kentucky 585 New Mexico
408-415 Tennessee 586 Guam & American Samoa
416-424 Alabama 586 All Other Pacific Territories
425-428 Mississippi 587-588 Mississippi
429-432 Arkansas 589-595 Florida (also 261-267)
433-439 Louisiana 600-601 Arizona (designated)
440-448 Oklahoma 602-626 California (designated)
449-467 Texas 700-728 Railroad Retirement
468-477 Minnesota 729-999 Currently not in use


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