Survey about something.  I hung up as soon as they said they were calling to ask my opinion about something something blah blah.  Blocked.

left no message, didn't answer

Answered, no one there

this number has been calling several times a day. When we answer it is a recording saying they want to conduct a brief survey on behalf of Freedom America. We hang up at that point. If we do not answer, when the answering machine picks up they disconnect.