If you'd like to run your own nameserver you can associate your nameserver's IP address with a sub-domain using the 'Register a Nameserver' tool in your domain account. You can input the nameserver name and IP address through your account and that information will be submitted to the registry. Please follow the instructions below:

• Login to your account.
• From the menu on the left select DOMAIN NAMES,and then Register DNS.
• Use the tool in the first section of the page "Register a NameServer Name" to create your nameserver.

The domain must be in your account.

Each nameserver must begin with ns or dns
Example: ns1.yourdomain.com  dns2.yourdomain.net