Since "DoNot Call" seems to have no effect, I have resorted to screening and let any call that does not identify the caller by name go to the answering machine. This number seems to have called a couple times a day at weekly intervals. Caller ID simply says "Wireless Caller" . Caller leaves no message. Just for the heck of it I called the number and got a recorded message "The party that you are calling has a voice mail box that has not yet been set up yet - Goodbye"
I received a call from this number no one answers when you pick up ---- I also have reported this number to "Opt-Out" and we are still receiving calls. These are harrassing calls and we have put a tracer on our telephone to ID this caller.