The first three digits in anybody's SSN denotes the State they come from. Although, higher population counts lead to different numbers within that particular State, eg. New York, California, Florida, etc. lead to a change on the second digit and, in many cases, denotation in the -xx identity within the State itself. For instance, the first three digits of your Social indicate the State/ or area inside the State in higher populace ( kind of like an area code), the second two digits narrow you down to where you were in that particular State/region of the State at the time of your birth, the last four indicate which application for said SSN you were at the time it was applied for when your birth certificate was authenticated by the Social Security Administration. The first three of mine are 504, denoting SD ( low population density, almost everybody from SD has this as their first three). In MS, it seems to be a red-flag even though I've spent almost two-thirds of my life here. Look this one up, guys, especially those of you fact-finders. It's like a serial number for humans being, at least those of us calling ourselves US citizens.