If a unknown caller keeps calling me, is there any way I could see who it is or the number?
You should report the problem and ask police to help or say not to call you again.
If the number shows up, try entering it into http://tinyurl.com/revphoneinfo and see if any results show up. If the number is totally anonymous and the caller is harassing, try calling the ISP. Or just don't answer unknown callers..simple.