ipv6calc 4 Conversion powered by ipv6calc ipv4-addr 1 IPv4 address ipv6-addr 1 IPv6 address reverse-lookup-successful 1 Reverse lookup successful addrtype 4 Adress type ipv4-addr.addrtype 3 IPv4 address ipv6-addr.addrtype 3 IPv6 address reverse-lookup-successful.addrtype 1 Reverse lookup successful