as you all know the IPs that we have now (ex: 209.95.43.100) are running short and the new system is already been implemented and used on 10% of the internet. It is time you should ask if your host is preparing for it. Just a few months ago a customers was complaining that he could not access our site or that he could not login to the billing system (we use whmcs) because there was a warning that the license was invalid. we tried multiple times different locations and browsers nothing the site was perfectly normal, that was when I realized the customer was browsing our site with an IP v6. Next day we start to implement the system. I suggest you email your host and ask them what they doing. also you can test if your host site is ready by going to: ip6.nl