SSN number's first digit apparently depends on where you apply it from. For example I did mine from NJ and it starts with 1. My wife and daughter did it from Chicago area, IL and it starts with 3. I didn't know or notice this until my cell phone dealer asked me if I had moved from NY/east coast area when I gave him my SSN to sign up. I was surprised and asked him how he knew that I had moved from NY/NJ area which was almost 4.5 years ago and he said that SSNs from that region start with 1 and those from chicago with 3.