title: Maxmind ipv6 - How to take an IPV6 IP and convert it into a block they provide?
body: <p>Maxmind provide a free ipv6 downloadable csv. They provide ip range blocks, but does anyone know how I can someones ipv6 ip and do a check within the blocks they provide?</p>
  
  <p>Here is an example of a csv entry. I believe the headers are as follow:</p>
  
  <p>start ip,end ip,start ip block, end ip block, ...</p>
  
  <p>"2001:200::", "2001:200:ffff:ffff:ffff:ffff:ffff:ffff", "42540528726795050063891204319802818560", "42540528806023212578155541913346768895", "JP", "Japan"</p>