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.
Some guy found our google ad and was soliciting SEO services. Sounds like a phone number that a service uses to pump out various cold call advertising.
I didn't answer either, it/they has/have called 2x in the last 2 days. I wish they'd have called my google voice number so I could block it more easily... oh well.