I tried entering 0 in front. We will have to wait and see. I get a call from that # at least once a day during the week. I tried calling the # back, but I get a recording from Verizon that my phone is protected from fraudulent calls. Since it won't let me call it I would think I should be able to block it. It never ceases to amaze me how little we can do with all the technology that is available.