Number no longer in service message

Thanks for your helpful response. The reason it should indicate that the number is no longer in service is that people calling the number are left with no indication why the call didn’t go through. It’s as if the call were dropped on one end or the other.

Sounds like a problem with the phone provider you're calling from. have you tried calling from a Cox number? also why is this causing a problem? if you canceled your phone number, people shouldn't be calling you at that number. Give them your new number. it could be a simple as the old number now belongs to someone else and they are blocking you.