Who called from 7704159159

Received a call from this number on my cell phone.  Did not leave a message.

7/26/17 @11:28AM CID showed this number,answering machine picked up NO message left NO idea who or what

11:18am CDT to cell. Didn't answer, no message left.

Checked another site. Reported scams for this # include business loan, car warranty, Google listing, etc

This # appeared on my caller ID on my phone. Thought it might have been my father-in-law, so I answered. I said hello a couple times with no response, so I hung right up. I then checked Google because I was concerned this might have been a way to silently hack my phone.