4 ms·
I have friends who are twins and they both were issued same SSN number. Apparantly their primary key is first_name(first 6 chars)+last_name(first 6 chars)+DOB
by gandutraveler 9y ago
I have friends who are twins and they both were issued same SSN number. Apparantly their primary key is first_name(first 6 chars)+last_name(first 6 chars)+DOB
- swiley 9y agoI don't think that's quite right, the city you're born in is included as well.
- PeterisP 9y agoTwins most likely have been born in the same city, unless the birth happened e.g. on a high speed train and they decided to file different birth places depending on the closest station.
- clintonb 9y agoHow old are your friends? Now that there is a central issuer, rather than regional, the probability of generating duplicate numbers is quite low.