This KB article will take you through the steps of updating your domain nameservers via the Rackzar customer zone.
Step 1 .Log in to your client area, then navigate to "Domains" and select "My Domains."
Step 2 . Find the domain name that you want to update and click on the "Manage" button.
Step 3 . Select the "Nameservers" option
Step 4 . Locate the section that enables you to modify the name servers, often referred to as "Use Custom Nameservers".
Step 5 . Enter the new name servers that you want to use for your domain. You will typically need to enter at least two name servers for redundancy, and they should be provided to you by your web hosting provider.
Step 6. Click the 'Change Nameservers' button.
It's important to note that changes to name servers can take up to 24 - 48 hours to reflect across the internet. During this time, your website and email may not function properly.If you are switching to a new web hosting provider, it's a good idea to make sure that your website and email are still working properly after the name server changes have propagated.