Just got a call from this #.  Didn't recognize it so cancelled the call by pressing hang-up button on cell.  Do Not Call Registry has never worked and, even if it does, I'd bet they are swamped with a billion complaints.  I have call blocking but it is limited to 30 numbers.  Verizon also offers blocking for 20 numbers for $5.00 per month.  Talk about blood suckers.  I read an earlier post about some call blocking apps which I am going to check out further.