How do I register my own name servers (glue records)?
Glue records associate a hostname with an IP address. They are needed when you want to set your domain's name servers to a hostname that is a subdomain of your domain.
To create your own name servers for a domain registered at Dynadot, please follow these steps:
You can submit either an IPv4 or IPv6 IP address (except .WS domains, which do not support IPv6 addresses). You can also set multiple IP addresses. Please remember to configure your name servers with the corresponding A records. This would be done in your hosting control panel rather than your Dynadot account.
Your settings should look similar to what is shown below: (click to enlarge)
NOTE: Custom domain name servers (glue records) can only be registered at Dynadot if the domain is registered here. If you are trying to register a name server for ns1.mydomain.com, for example, and mydomain.com is registered with a third party, you would not be able to create glue records with Dynadot.From Help Section: Account Management > Domain Settings > How do I register my own name servers...