I get these spam phone calls also. After reporting so many of them because I am on the do not call list I was told these are generated through the internet and they have a hard time stopping them.
I received a crank call from this number today. I answered with my name and now I am worried they wanted to hear me say that so they could confirm my phone number in conjunction with Identity theft. Nobody spoke on the other end so I hung up after I announced myself. My info has been compromised, most recently thorough my college which I attended 20 years ago. So in my mind, this call was somehow associated with that. Who knows?