• solrize@lemmy.ml
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    2 days ago

    If this is US social security numbers, they only have 9 digits so there can’t be billions of them.

    • treadful@lemmy.zip
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      2 days ago

      They get reused. Also:

      About 52% of the records had unique SSNs

      • solrize@lemmy.ml
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        2 days ago

        https://www.ssa.gov/history/hfaq.html :

        Q20: Are Social Security numbers reused after a person dies?

        A: No. We do not reassign a Social Security number (SSN) after the number holder’s death. Even though we have issued over 453 million SSNs so far, and we assign about 5 and one-half million new numbers a year, the current numbering system will provide us with enough new numbers for several generations into the future with no changes in the numbering system.