Verizon Wireless allows you to block up to five numbers from calling your cellphone using a feature called Spam Controls. You can add the block through your My Verizon account on the Verizon Wireless website. The blocks expire after 90 days, but you can block the number again as many times as you want.
Log in to your My Verizon account on the Verizon Wireless website.
Click "My Services" and open "Verizon Safeguards."
Click "Spam Controls" and enter the number that you want to block.