IPv6 active hosts data provided by [Akamai](https://content.akamai.com/PG3184-IPv6-Active-Address-Data.html). 

Address space represented along an [Hilbert Curve](http://bl.ocks.org/vasturiano/aee11f57aaa6b1ec96f1df386166a396), 
using the [hilbert-chart](https://github.com/vasturiano/hilbert-chart) D3 component.

See also the [IANA Global Unicast version](http://bl.ocks.org/vasturiano/ba0bdc27ddc2b13012e85b2a0b7a1c43).