Our company has been trying to fix CNAM issues with Verizon phones for a number of years. We have some cell phones with Verizon that show the wrong name when we call VOIP land lines or when we check the phone number on sites like numlookup.com. I have contacted Verizon support five times now to fix this CNAM issue and the last two times I was told they cannot fix the CNAM problems for Verizon customers.
We are considering changing our service provider.