code: def is_reserved(self):
          
          return (self in IPv6Network('::/8') or
                  self in IPv6Network('100::/8') or
                  self in IPv6Network('200::/7') or
                  self in IPv6Network('400::/6') or
                  self in IPv6Network('800::/5') or
                  self in IPv6Network('1000::/4') or
                  self in IPv6Network('4000::/3') or
                  self in IPv6Network('6000::/3') or
                  self in IPv6Network('8000::/3') or
                  self in IPv6Network('A000::/3') or
                  self in IPv6Network('C000::/3') or
                  self in IPv6Network('E000::/4') or
                  self in IPv6Network('F000::/5') or
                  self in IPv6Network('F800::/6') or
                  self in IPv6Network('FE00::/9'))
docs: Test if the address is otherwise IETF reserved.
  
          Returns:
              A boolean, True if the address is within one of the
              reserved IPv6 Network ranges.