Who called from 7813399997

I get calls from this # a few times a week. If I answer they hang up, no messages are left. They think I'll really do business with them?

I picked up the phone and they said my last name.  I asked "who's this" and they hung up.  Like others have said, I called back and got the "call cannot be completed" message.

please help us to identifie 7813399997 caller,because it is very annoying.they call and hang up.and when we call back,it is either busy or not answering.

Calls in the evening.  Talks nonsense.  Very unsettling.

I get the same calls as the others.  I don't answer and they leave the number.  Massachusetts
than the nuber.  You can't call the nuber back.
VERY ANNOYING!