Who called from 6174530841

Called, no message.

Got a call. Hung up when I answered.

Called. No message. I'm guessing some kind of political campaign. It's that time of year.

Got a call. Probably junk.

Phone rang, I answered with "Hello".  After some seconds, a very strange male voice said "Hello".  I said, "Yes?"  Some seconds later, they repeated "Hello."  I asked, "Who is this?"  Waited some seconds, no answer, so I hung up.  It almost sounded like a parrot, or maybe a recording, as the two words sounded identical.