I have Verizon, forget Verizon's block numbers. Check out PrivacyStar. I have had it for 4 years and it is the best. Service is free unless you want the look up feature, then it is $19.95 a year no contacts. No limits to block numbers Phne never rings from known telemarketers.
this number calls all the time. I mean multiple times a day every day or every other day at all house. When I answer there's no one on the line and when I call back it doesn't even ring. Finally just blocked it.