(again, apologies for using my personal address - but it's subscribed here)
This is reminder that there is a scheduled change to the IPv6 addresses for the L-Root
server, that will take effect on March 23, 2016.
The new IP addresses for the L.ROOT-SERVERS.NET
Please remember to update your root “hints” files on your DNS infrastructure.
(as per : http://www.dns.icann.org/2015/11/05/l-root-ipv6-renumbering/