Since the transfer, the site was blocked from public view twice and both times the offending IP address in the blacklist was the actual server IP address: 173.231.221.2
Once I removed the IP address from the BL the site returned to functioning only to get blocked again a few hours later.
For now I deactivated admin tools and placed the IP address in the white list in the Configuration (but not the actual WL).
In all the years I have been using admin tools, I have never seen this and google has not been helpful.
The only reference to something similar happening was an old post that mentioned a patch was on the way, so I assume that post Is no longer valid.
I am hoping this is something simple I can fix, otherwise I'll make this post private and send you access to the server.
Thank you.