cfcfcfcf, that’s a great question!
When you add number to your blocked number list all calls and text messages from that number are blocked. Unfortunately, there is no way to know if that specific number has attempted to call or text you because they are being blocked by the system.
I trust this information has fully answered your question. I’m here if there is anything else I can assist you with.
Follow us on Twitter @VZWSupport