Please note that the first 3 digits of a Social Security Number do not in fact have a solid association with a particular state of residence or other geographically significant area, except in a very broad sense, and in any case that association fell apart long ago.
Here's the story, via Wikipedia:
The Social Security number is a nine-digit number in the format "AAA-GG-SSSS"...Sorry. Back to the drawing board on this one.The Area Number, the first three digits, is assigned by the geographical region. Prior to 1973, cards were issued in local Social Security offices around the country and the Area Number represented the office code in which the card was issued. This did not necessarily have to be in the area where the applicant lived, since a person could apply for their card in any Social Security office. Since 1973, when SSA began assigning SSNs and issuing cards centrally from Baltimore, the area number assigned has been based on the ZIP code in the mailing address provided on the application for the original Social Security card. The applicant's mailing address does not have to be the same as their place of residence.
Thus, the Area Number does not necessarily represent the State of residence of the applicant regardless of whether the card was issued prior to, or after, 1973.
Generally, numbers were assigned beginning in the northeast and moving south and westward, so that people on the East Coast had the lowest numbers and those on the West Coast had the highest numbers. As the areas assigned to a locality are exhausted, new areas from the pool are assigned, so some states have noncontiguous groups of numbers.
But fear not, there's a ton of bogus crap yet to dig up about the Imposter. Have fun!