2011-06-10 2012-03-26 Once a zone is added to one of these subregistries, it is effectively added permanently; once an address range starts being configured as a local zone in systems on the Internet, it will be impossible to reverse those changes. IETF Review 10.IN-ADDR.ARPA RFC1918 Zone 16.172.IN-ADDR.ARPA RFC1918 Zone 17.172.IN-ADDR.ARPA RFC1918 Zone 18.172.IN-ADDR.ARPA RFC1918 Zone 19.172.IN-ADDR.ARPA RFC1918 Zone 20.172.IN-ADDR.ARPA RFC1918 Zone 21.172.IN-ADDR.ARPA RFC1918 Zone 22.172.IN-ADDR.ARPA RFC1918 Zone 23.172.IN-ADDR.ARPA RFC1918 Zone 24.172.IN-ADDR.ARPA RFC1918 Zone 25.172.IN-ADDR.ARPA RFC1918 Zone 26.172.IN-ADDR.ARPA RFC1918 Zone 27.172.IN-ADDR.ARPA RFC1918 Zone 28.172.IN-ADDR.ARPA RFC1918 Zone 29.172.IN-ADDR.ARPA RFC1918 Zone 30.172.IN-ADDR.ARPA RFC1918 Zone 31.172.IN-ADDR.ARPA RFC1918 Zone 168.192.IN-ADDR.ARPA RFC1918 Zone 0.IN-ADDR.ARPA IPv4 "THIS" NETWORK 127.IN-ADDR.ARPA IPv4 LOOPBACK NETWORK 254.169.IN-ADDR.ARPA IPv4 LINK LOCAL 2.0.192.IN-ADDR.ARPA IPv4 TEST-NET-1 100.51.198.IN-ADDR.ARPA IPv4 TEST-NET-2 113.0.203.IN-ADDR.ARPA IPv4 TEST-NET-3 255.255.255.255.IN-ADDR.ARPA IPv4 BROADCAST IETF Review 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6.ARPA IPv6 Unspecified Address 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6.ARPA IPv6 Loopback Address D.F.IP6.ARPA IPv6 Locally Assigned Local Address 8.E.F.IP6.ARPA IPv6 Link Local Address 9.E.F.IP6.ARPA IPv6 Link Local Address A.E.F.IP6.ARPA IPv6 Link Local Address B.E.F.IP6.ARPA IPv6 Link Local Address 8.B.D.0.1.0.0.2.IP6.ARPA IPv6 Example Prefix