Who called from 6178616207

Received a call and they left no message. Robot dialer?

Cell rang, no one there.

Called and rang twice, did not leave voicemail

I actually called back: "My name is lisa from Rewards Redemption ...." offering $100 rewards because I visited some affiliate website ... BULL, I know I didn't.  Another form of scam.  They have an option to press #2 to be put on Do Not Call list.

DO. NOT press any numbers. That tells the caller the number is active - expect more calls.