If you enable ipv6 for your docker containers with these lines in your /etc/docker/daemon.json like illustrated in the official documentation, { "ip6tables": true, "fixed-cidr-v6": "2001:db8:1::/64" } your containers will get an ip from the range 2001:db8:1::/64. But this range is just used as an example in the documentation, and has nothing special. It is a normal routable range. It is advised to not reuse that range if it was not assigned to you.