Who called from 8316618078

This number has called my cell phone several times in the last week.  Once, I answered and it has a recorded voice that said "Goodbye" as soon as I said hello.  Once, I called it back, it picked up and then silence.  The line stayed open until I hung up.

Says on caller id Monterey Peninsula Area. Called at 7:59pm one day and 8:15pm another. Never answered. No message left.

Called yesterday...didn't answer and they didn't leave a message.  Called today and I answered...long pause before they said hello which usually means telemarketer.

Calls with no message

Did not answer call as it came thru as unknown caller