We got the exact same "John Pierson" call at 2:23 in the morning. According to my mother, this is not the first call she's received. We are on the Do Not Call registry, so I went right to their website and filed a complaint. Their website is www.donotcall.gov. Complaints can also be filed online with the FCC, though I don't have their address handy.
I got a call today with 774-907-9209, but 2 days before I kept receiving "unknown" calls.
I called the number and it asked if I wanted to be removed from call list by pressing #1. I tried pressing 0 because I want to speak to a person to find out how they even got my number!
Robocall asking to press 1 if I was interested and 9 if I was not. I pressed 1 so I could get a live person and ask them to take me off their list and it just said, "Thank you," then hung up.
PLEASE FILE A COMPLAINT WITH THE FCC IF THE SAME THING HAPPENS TO YOU HERE:
https://esupport.fcc.gov/ccmsforms/form1088.action?form_type=1088G