There are approximately 804 dioceses in the Anglican Communion. As of December 2018, we are aware of websites for 537 of them; that's about 67%.
here to see the most recent master list of dioceses and their home
pages, and click
here to find the most recent master list of diocese, province, and
country domain names. While these lists are almost certainly the most complete
lists in the world, they are not in a particularly usable format; for
most purposes you should refer to the country sections of Anglicans
Online to find Diocesan web pages.