> On June 25, 2011, the SSA changed the SSN assignment process to "SSN randomization". SSN randomization affected the SSN assignment process in the following ways:
> 1. It eliminated the geographical significance of the first three digits of the SSN, referred to as the area number, by no longer allocating specific numbers by state for assignment to individuals.
> 2. It eliminated the significance of the highest group number assigned for each area number, and, as a result, the High Group List is frozen in time and can be used for validation of only those SSNs issued prior to the randomization implementation date (see section "Valid SSNs").
> 3. Previously unassigned area numbers have been introduced for assignment, excluding area numbers 000, 666 and 900–999. [1]
[1] https://en.wikipedia.org/wiki/Social_Security_number#Structu...