If you set up your own host names as nameservers, you can edit them as well as add or edit their corresponding IP addresses.
If there are domain names currently pointed to these host names, you can't remove them. Further, changes you make to host names can affect how those domains function. Be cautious and verify your settings before saving changes.
How you edit your host names will depend on the view of your account.
In Card View, your account will look something like this:
In List View, your account will look something like this:
Host name changes can take up to 48 hours to propagate. Hosting or other domain name features might not work during the propagation period.