User blog comment:Rappy 4187/Technical Update: June 28, 2017/@comment-1757994-20170628203455


 * IPv6 support is now live! This means you will start seeing some longer IPv6 IPs in place of IPv4 IPs for anonymous users - however, they will behave much the same. If you spot any problems, please let us know!

FYI, ISPs typically hand out IPv6 addresses in /64 blocks (in some cases in /48 blocks). So if you see an IPv6 vandal, it's not enough to block his /128 address, because he's got 2^64 (and maybe 2^80) addresses from his ISP.