After reading www.postgresq.org now active over IPV6 by default I quickly tried some other host to see what the current state of IPv6 is for some known database websites. $ getent hosts mysql.com percona.com askmonty.org postgresql.org oracle.com sqlite.org code.openark.org skysql.com drizzle.org 156.151.63.6    mysql.com 74.121.199.234  percona.com 173.203.202.13  askmonty.org 2a02:16a8:dc51::50 postgresql.org 137.254.16.101  oracle.com 67.18.92.124    sqlite.org 69.89.31.240    code.openark.org 94.143.114.49   skysql.com 173.203.110.72  drizzle.org So only postgresql.org supports IPv6 right now. On the MySQL side Facebook is one of the known IPv6 users. Are there any IPv6  database websites I forgot to include? The World IPv6 Launch is June 6 2012, so there are still a few days left to enable IPv6!