First of all, just in case you are asking What are nameservers? Now that is out of the way.
When creating private nameservers, you will need to register a minimum of two.
To register private nameservers with hostxnow.com, login to your customer account at https://www.hostxnow.com/clients/clientarea.php and then follow this guide.
1. Click 'Domains'
1. Click on the little triangle (drop-down menu) next to the domain you would like to manage and click 'Manage Domain'.
2. Click 'Private Nameservers' in the left-hand menu on the page.
3. Enter the name nameservers under Register a NameServer Name
Note: These are usually ns1 or dns1
4.E.g ns1 in the text box next to Nameserver. Add theIP Address you want to assign to ns1.
5. Repeat the same for the secondary Nameserver (Optional, but recommended)
Note: When creating private nameservers it may take up to 72 hours for these to propagate throughout the internet.