3 ms·

Unfortunately, the namespace is very small: there are 900 million possible SSNs (100-00-0000 - 999-99-9999) and approximately 300,000,000 Americans.

• vaksel 17y ago
  why not add a 2nd #(like a 4 digit pin) for each social security #. Credit cards have them, why not something as important as your official government id?
  • seldo 17y ago
    Interesting, especially if you could set that PIN yourself. So if you were the victim of identity theft (or suspected you would be) you could change the PIN on your SSN. Of course, they'd have to have some kind of retrieval mechanism for your PIN if you forgot it, and it would probably ask your mother's maiden name...
    • vaksel 17y ago
      not necessarily, they can use your driver license official address to send you a letter with a temporary pin #
    • wlievens 17y ago
      Passports in Belgium have a PIN code.
• jonknee 17y ago
  It's actually even smaller than that: http://en.wikipedia.org/wiki/Social_Security_number#Structure http://en.wikipedia.org/wiki/Social_Security_number#Structur... There are odd and even rules and no number starts out higher than 772.