http://ipv6prepared.com
http://ipv6-test.com/validate.php
http://richpreview.com
https://www.mythic-beasts.com/ipv6/health-check
http://ip6.nl
http://validador.ipv6.br/index.php?lang ... ri=referer
http://ready.chair6.net
http://inetcore.com/project/websurvey/index_en.php
http://cloudflare.ipv6-test.com/validate.php
http://ip6tools.com