Some of IPv6 reserved addresses

::/128 - unspecified address (0.0.0.0)
::/0 - default route
::1/128 - loopback address—a virtual interface that loops all traffic back to itself, the local host
2000::/3 - global unicast tunneling
fc00::/7 - unique local address
fe80::/64 - Link-local address
ff00::/8 - multicast address