I have received numerous calls from this "blocked" number for the past week.  I finally spoke with them today and He advised I had received a grant from the US Federal Government.  He wanted my name, address, date of birth and bank account.  I hung up on him and he had the audacity to call back and give me this call back number for his senior manager (which sounded nothing like that when he said it).  I googled the number and thankfully saw this and told him he was busted that I knew it was a scam.  I too am on a Do Not Call List.