Registry nameserver records are used to point the nameservers for your domain name to a specific IP address; you are advising the registry to direct the traffic for your nameserver to its designated IP address. To create Registry Nameserver records please follow these steps:

Step 1.
Login to your Rebel account and select Domain Manager.

Step 2.
Click directly on your domain name to access the domain editing page.

Step 3.
On the domain editing page, select the DNS tab.

Scroll down to Registry Nameserver Records and click Add Nameserver.

Step 4.
You will be required to enter a prefix, such as DNS or NS. The second part of the record, the DNS suffix, will default to your root domain name (for example, "dns.rebelexample.com" or "ns1.rebelexample.com"). You will need to enter an IP address for your nameserver, in either IPv4 or IPv6 format. Click Add Nameserver to save.

Repeat this for your second record, using a second prefix (such as "dns2.rebelexample.com" or "ns2.rebelexample.com"). You will need to enter an IP address for your nameserver, in either IPv4 or IPv6 format. 

Step 5.
Click Save Changes in this section.

After updating the Registry Nameserver Records, it can be several hours before you see your site resolving.