Those all work for me, on my v6-only desktop. (I don't use Discord, but their homepage loads at least.) None of those sites have v6 though, so you'll need some

Those all work for me, on my v6-only desktop. (I don't use Discord, but their homepage loads at least.) None of those sites have v6 though, so you'll need some form of backwards compatibility running to reach them. Presumably you were missing that.