If you have completed setting your Fully Branded
Name Servers
and/or Control Panel Login URL, you can generally start using them within 24-48 hours.
If you have followed all the instructions correctly, then when you ping your Branded Name
Servers or visit your Control Panel Login URLs, you will be able to see results.
Reference:
How to set your
Fully Branded Name Servers >>
How to set your
Fully Branded Control Panel Login URLs >>
Do not be confused when you encounter errors
such as No NS A records at nameservers while using some DNS Tools like
DNSReport.com. This does not indicate an error and will not affect the
resolution of your domain name or Name Server.