We have only 2 ISPs that completely dominate the market. Both have rolled out IPv6. Technically everyone can be on IPv6 but there are stil a lot of old routers in circulation.
Interesting. Belgium shows up so small in the map in that page that I didn't even notice it was bright green, and therefore didn't include it in the title.
They plan to have all up-to-date modems provisioned with IPv6 before the end of this year.