About 16% to 23% of the Alexa 500 top sites have ipv6 support [0]. There hasn't been much of a change since august 2018 (17% to 21%) [1], or Oct 2016 (19% to 21

About 16% to 23% of the Alexa 500 top sites have ipv6 support [0]. There hasn't been much of a change since august 2018 (17% to 21%) [1], or Oct 2016 (19% to 21%) [2]. 5 years is a long time in tech. Meanwhile on the user side support has tripled from about 11% in 2016 to 33% recently [3]. I guess when you run a scalable web service, you need comparatively few publicly available ip addresses, and everyone has ipv4 anyways, while when you run an ISP, you need way more ip addresses. So the problem is way more pronounced for ISPs than the service providers. I guess the number of deployments with carrier grade NAT without ipv6 support is quite low. [0]: http://www.delong.com/ipv6_alexa500.html http://www.delong.com/ipv6_alexa500.html [1]: http://web.archive.org/web/20180826104925/http://www.delong.com/ipv6_alexa500.html http://web.archive.org/web/20180826104925/http://www.delong.... [2]: http://web.archive.org/web/20161019011050/http://www.delong.com/ipv6_alexa500.html http://web.archive.org/web/20161019011050/http://www.delong.... [3]: https://www.google.com/intl/en/ipv6/statistics.html https://www.google.com/intl/en/ipv6/statistics.html