title: IPv6 address assignment in the 0::/8 range
body: <p>I need to know if the address in the range 0::/96 can be actually assigned in IPv6 or not. 
  I've found the reference on IANA that IANA can't assign that range (actually 0::/8 range) but I can't find it as being an actually "reserved" range. 
  My issue is that I'm converting IP Addresses from integers on python. Using the standard library ipaddress which has a convenient factory method <code>ip_address</code> that applies the simple heuristic, if n &lt; 2**32 then ipv4 else ipv6.</p>
  
  <p>This heurisitc would be great if I could find a place in which it screams out to networks admins to forbid using this range xD </p>
  
  <p>Anyway, thanks!</p>