Work done by Mike Leber of Timico peering partner Hurricane Electric suggests that of the Alexa top 1 million domains only 2136 of them are IPv6 ready – that is to say they are running native IPv6.

With less than a year to go ot IPv4 exhaustion this suggests there is still much to be done.

It is brought home when you compare the top 50 sites with the top 50 IPv6 enabled sites – none of the domains in the former is listed in the latter. Now this doesn’t come as much of a surprise – big sites need to tread carefully as they have more to lose by getting the migration wrong.

It may also be seen (lists below) that the IPv6 sites are more geeky in nature though not exclusively so – worldofwatches.com for example.  Some of this will be down to the domain registrars not yet supporting IPv6.  It would be interesting to get a list of regstrars that are IPv6 ready.

Alexa Top 50 Domains (Ipv6 domains are lower down)

Google.com
Facebook.com
YouTube.com
Yahoo.com
Windows Live.com
Baidu.com
Wikipedia.org
Blogger.com
Twitter.com
msn.com
qq.com
yahoo.co.jp
google.co.in
taobao.com
amazon.com
sina.com.cn
Google.de
Google.com.hk
Wordpress.com
Google.co.uk
ebay.com
microsoft.com
bing.com
google.fr
yandex.ru
linkedin.com
google.co.jp
163.com
google.co.br
myspace.com
craiglist.org
fc2.com
conduit.com
mail.ru
google.it
flickr.com
vkontakte.ru
googleusercontent.com
imdb.com
google.es
sohu.com
apple.com
livejasmin.com
soso.com
bbc.co.uk
go.com
aol.com
rapidshare.com
youku.com
paypal.com

IPv6 enabled domains (source Hurricane Electric) – data is for www. prefixed domains – dropping the www gives a slightly different list

www.softlayer.com
www.xomba.com
www.debian.org
www.free.fr
www.ucla.edu
www.tokyotosho.info
www.doctissimo.fr
www.01net.com
www.simplyrecipes.com
www.leaseweb.com
www.odn.ne.jp
www.kddi.com
www.cnnic.cn
www.geenstijl.nl
www.freebsd.org
www.spitsnieuws.nl
www.nyaatorrents.org
www.gamershell.com
www.koreus.com
www.arin.net
www.fedoraproject.org
www.blueboxgrid.com
www.weeronline.nl
www.spele.nl
www.keio.ac.jp
www.italiansubs.net
www.ripe.net
www.upic.me
www.cyberciti.biz
www.kino.de
www.dti.ne.jp
www.animesuki.com
www.servage.net
www.nnm-club.ru
www.python.org
www.registro.br
www.emulator-zone.com
www.torrentfreak.com
www.hentai-foundry.com
www.mhlw.go.jp
www.monash.edu.au
www.hitachi.co.jp
www.rtbf.be
www.autobazar.eu
www.he.net
www.zoover.nl
www.nta.go.jp
www.456bereastreet.com
www.icann.org
www.worldofwatches.com