Few ISPs enabled IPv6 whether hosting companies or the ISPs which serve individuals. CloudFlare offers you a feature to enable your site to work with both IPv4 and IPv6 without the need to modify anything in the network, you only need to login to your account and enable it with a single click, now your site is able to work with both.
Activating IPv6 Support feature
Login to your cPanel then press the “CloudFlare” icon
Press “Statistics and Settings” besides the domain you want to enable the feature on.
Then modify “Automatic IPv6” to “Full” instead of “Off”
With this your site (in our example crackrz.com) supports connections through IPv4 and IPv6
Note: If you had any problems in connecting to your site after enabling this feature, return the setting to “Off”. Also open a ticket for hosting department to check the issue.