The Internet Corporation for Assigned Names and Numbers (ICANN) has added IPv6 addresses for six of the world’s 13 root server networks (A, F, H, J, K, M) to the appropriate files and databases. 
The move allows for the possibility of fuller IPv6 usage of the Domain Name System (DNS). Previously, those using IPv6 had needed to retain the older IPv4 addressing system in order to be able to use domain names.
“Today’s addition of IPv6 addresses for the root servers enhances the end-to-end connectivity for IPv6 networks, and furthers the growth of the global interoperable Internet,” added David Conrad, ICANN’s Vice President of Research and IANA Strategy. “This is a major step forward for IPv6-only connectivity and the global migration to IPv6.”http://www.icann.org
