My cell number is on all Do Not Call lists and "don't call me for marketing purposes" with Verizon. After several days of getting calls from this number during lunch and dinner hours (I didn't answer since it was an unknown number), I finally called THEM. It's Verizon, trying to sell more products and services. In other words, a Marketing call.
IT IS A SCAM, CALL MAIN VERIZON NUMBER AND ASK THEM.