Are nameserver Glue Records possible?

Yes, you can use name server Glue Records at easyname. The name servers of your domain can be changed at any time from your control panel by navigating to [Domains] -> [Manage] (Pen-Symbol) on the right side of your domain. Below the box with the heading "Accessibility" you will find the link [Use custom nameserver].

Please note that the name server Glue Record must be declared in the following format: e.g., "ns1.yourdomain.com / 213.123.234.80“