You can use as a domain name for any of your computers, containers or VMs. The required format is This is already a valid name and points to the IPv6 address 1234:5678:9abc:def0:1234:5678:9abc:def0. Alternatively you can also use the domain, which implies IPv6 stronger.

Both domains support IPv6 abbreviation using dashes, you can f.i. use 2a0a-e5c0–