No Call List Information

I am one of millions of people who hate telemarketers. I have put my name on the do not call list, but sometimes people get through. I don't know who they are, because their numbers do not come up on my caller ID. If you get the same kinds of calls, trying to find no call list information can be frustrating. Sometimes using Phone Number Trace is easier, as they can tell you who called from that annoying number.