Who I have the same questioned this topic

My cell phone number, which has always been with Verizon, has been registered with the federal do not call list since 2008. Over the last several months I have been receiving several telemarketing/robo-calls per week from many different numbers. Since I can only block 20 #'s with Verizon's paid service (which is ridiculous btw): Family Base, I block all of these numbers using a 3rd party app on my phone. But the calls keep on coming. So, is Verizon sharing or selling my phone number? Not many people have it, and it's not posted on the Internet anywhere.