You are seeing this error because the No-IP Plus domain you have in our system does not have its nameservers set to the No-IP name servers. In order for our DNS products to work with your domain, you will need to set them to:
If your domain registration is with No-IP, you can manage your name servers by clicking on the ‘Domain Registration’ tab.
Then selecting ‘Configure’ next to the domain you want to update.
Pull down the Name server, set “No-IP Plus Defaults” and it will auto populate the name servers for the Plus DNS service.
Note: Newly registered domain names can take 24-72 hours to full propagate to all of the root DNS servers.