Who called from 2106705000

Just called my cell phone, after a few rings as it was a local number I answered... I said Hello several times, no response on their end so I hung up

I keep receiving calls from this number but no one ever says anything.

L

Received call on my cell.  I let it go to voice mail and then checked it and no message was left, just empty air time.

Caller offering Disney trips with a $100 gift card when you book.