Got several calls from this number.  called back and after waiting a few min, someone picked up and said hello.  Asked what business they were and wouldn't say, kept asking for someone.  After asking 3 times what business they were with, they hung up.

Got a call from 256-649-3479 and they didn't leave a Voice Mail.  I called back and after several minutes an agent answered.  They were looking for someone else but it appears to be a collection company.  I had just gotten a new number so they were trying to get in contact with the previous owner of the number.