Who called from 9702369326

They called, asked for my boss, and hung up.

They keep calling but won't leave a message- I don't answer unrecognized numbers.

Called and hung up

Called and hung up. Is this a computer verifying if a number is valid for future phone soliciting? This is a non published number here.

Called and hung up.  My number is listed on the do not call registry and this makes 2 calls this week I've received on my unpublished number.