I just called the # back and there is a auto-attendant that allows you to be added to their do not call list and I also reported them on www.donotcall.gov
just got a call from 3125887690. we also recieved one yesterday. we are on the do not call list & usually just let these unknown calls go straight to the machine. we dont enter any contests so we knew not to bother answering.
I'm on DNC list also. Figured it was a telemarketer or survey and never answered. Today was about the 6th time they've called. I took the advice from above and called back. There are options to either add your # to the DNC list or just to ORC Protel's list.