Who called from 2028705002

No one was there when I answered

same here

another random # that keeps calling and not leaving messages.

I was told by the telephone company that these people call many numbers at the same time in hopes of someone picking up. If you pick up, that records your number and they will keep calling you until they can answer you. The suggestion from the telephone company is that if you have caller ID, don't answer these type of calls and they will eventually stop calling.

they call and hang up upon answering