title: Geolocation with IPv6?
body: <p>I'm working on an IP geolocation library that uses the first three octets of an IPv4 address to determine a user's country, city, lat, lon, etc. Works like a charm.</p>
  
  <p>But it doesn't handle IPv6 addresses, and I'd like it to do so.</p>
  
  <p>Is there any way to transform an IPv6 address to get the equivalent of the first three octets of an IPv4 address, or are they on an entirely different numbering scheme, requiring a completely different ipgeo mapping?</p>