WARNING
This will be the FINAL publication of the High Group List. The implementation of SSN Randomization on June 25, 2011 eliminates the significance of the High Group List, making it ineffective for validating SSNs issued through the new random assignment method. Please visit SSN Randomization for more information regarding this change and other effects on the SSN resulting from randomization.
Knowing what Social Security numbers have been allocated will help you determine if a SSN is valid. We have guides that will help you make this determination:
High Group History List
This list shows the SSN area and group numbers that have been issued as of this month.
2008
December 2008November 2008
October 2008
September 2008
August 2008
July 2008
June 2008
May 2008
April 2008
March 2008
February 2008
January 2008
2005
December 2005November 2005
October 2005
September 2005
August 2005
July 2005
June 2005
May 2005
April 2005
March 2005
February 2005
January 2005
Social Security Number Allocations
How SSNs are assigned and a list of number areas by State.
SSN - Order of Issuance
Further Explanation of How to Understand SSN Assignment
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