This is very likely a criminal scam because: They call numbers on the do not call list. The caller ID does not list a name or business name. They do not leave a message. Google cannot find a company with this number.
Answered call from 516-220-3529 and no one was on the line. I am also on the Do not Call Registry. Receive one or two calls per day from Rachel at card services. Caller ID shows that the call is coming from my phone #. The Do Not Call list means nothing to these a$$ holes.