IPv4 has been a big success but due to the increase in the number of users in the current context of the world, the number of IP are getting lower and lower. And the temporary solution to it was Routers and switches that help create local network and distribute local IP’s. But with the IPv6, now every grain of sand in the world can get a unique IP address.
But opening the IP directly from browser is quiet different. Previously, on IPv4 we used to open http://127.0.0.1/, http://192.168.1.1/ and something like that. But with the technology of Ipv6 we cannot open the IP directly like: http://ipv6/ rather you need to keep the IPv6 inside a [Big Bracket].
For http://localhost/ to be IPv6, you can use as: http://[::1]/ OR http://[::]/
Similarly, you can open Google’s IPv6 by pinging ipv6.google.com

NOTE: If you get the IPv6 address from your Router but you cannot ping the ipv6.google.com then it doesn’t mean you are having the problem. Because your ISP(Internet Service Provider) is not providing any IPv6 service yet. In case of my country Nepal, my Router with ADSL2+ supports IPv6 for my local computer but Nepal Telecom hasn’t released IPv6 to the customer. According to some research, they have successfully installed the IPv6 system for testing purpose.
Welcome to the new world.
IPv6