Or maybe South Korea, being a rich country and all, has 2.3 IPv4 addresses per capita available, likely to be enough for a while yet, and there's always the pos

Or maybe South Korea, being a rich country and all, has 2.3 IPv4 addresses per capita available, likely to be enough for a while yet, and there's always the possibility to buy more. http://en.wikipedia.org/wiki/List_of_countries_by_IPv4_address_allocation http://en.wikipedia.org/wiki/List_of_countries_by_IPv4_addre... And it has a very domestically oriented Internet. If IPv6 really matters, and there's hardly going to be much one can access via IPv6 but not IPv4 for a while yet, I can tunnel through and get IPv6 somewhere and vice versa. I can't tunnel myself a 100 Mbps upload speed when I only have 1 Mbps. And all that's assuming that South Korea isn't doing IPv6 at all. Maybe they just haven't got as much of an incentive compared to, let's say, China with 0.25 IPv4 addresses per capita.