IP blocks

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IPv4

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Address Block Family Present Use Reference
0.0.0.0/8 IPv4 This Network RFC 1122, Section 3.2.1.3
RFC 3330, Section 3
10.0.0.0/8 IPv4 Private-Use Networks RFC 1918
RFC 3330, Section 3
14.0.0.0/8 IPv4 Public-Data Networks RFC 1700, page 181
RFC 3330, Section 3
100.64.0.0/10 IPv4 Shared Address Space RFC 6598
127.0.0.0/8 IPv4 Loopback RFC 1122, Section 3.2.1.3
RFC 3330, Section 3
169.254.0.0/16 IPv4 Link Local RFC 3927
RFC 3330, Section 3
172.16.0.0/12 IPv4 Private-Use Networks RFC 1918
RFC 3330, Section 3
192.0.0.0/24 IPv4 IETF Protocol Assignments RFC 6890, Section 2.1
RFC 3330, Section 3
192.0.0.0/29 IPv4 DS-Lite RFC 6333
192.0.0.8/32 IPv4 IPv4 dummy address RFC 7600
192.0.0.9/32 IPv4 Port Control Protocol Anycast RFC 7723
192.0.0.10/32 IPv4 Traversal Using Relays around NAT Anycast RFC 8155
192.0.0.170/32
192.0.0.171/32
IPv4 NAT64/DNS64 Discovery RFC 8880
RFC 7050, Section 2.2
192.0.2.0/24 IPv4 TEST-NET-1 RFC 5737
RFC 3330, Section 3
192.31.196.0/24 IPv4 AS112-v4 RFC 7535
192.52.193.0/24 IPv4 AMT RFC 7450
192.88.99.0/24 IPv4 6to4 Relay Anycast RFC 3068
RFC 3330, Section 3
192.168.0.0/16 IPv4 Private-Use Networks RFC 1918
RFC 3330, Section 3
192.175.48.0/24 IPv4 Direct Delegation AS112 Service RFC 7534
198.18.0.0/15 IPv4 Network Interconnect Device Benchmark Testing RFC 2544
RFC 3330, Section 3
198.51.100.0/24 IPv4 TEST-NET-2 RFC 5737
203.0.113.0/24 IPv4 TEST-NET-3 RFC 5737
224.0.0.0/4 IPv4 Multicast RFC 3171
RFC 3330, Section 3
240.0.0.0/4 IPv4 Reserved for Future Use RFC 1112, Section 4
RFC 3330, Section 3
255.255.255.255/32 IPv4 Limited Broadcast RFC 0919, Section 7
RFC 0922, Section 7

IPv6

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Address Block Family Present Use Reference
::/128 IPv6 Unspecified Address RFC 4291
64:ff9b::/96 IPv6 IPv4-IPv6 Translat. RFC 6052
::ffff:0:0/96 IPv6 IPv4-mapped Address RFC 4291
64:ff9b::/96 IPv6 IPv4-IPv6 Translat. RFC 6052
64:ff9b:1::/96 IPv6 IPv4-IPv6 Translat. RFC 8215
100::/64 IPv6 Discard-Only Address Block RFC 6666
2001::/23 IPv6 IETF Protocol Assignments RFC 2928
2001::/32 IPv6 TEREDO RFC 4380
2001:2::/48 IPv6 Network Interconnect Device Benchmark Testing RFC 5180
2001:3::/32 IPv6 AMT RFC 7450
2001:4:112::/48 IPv6 AS112-IPv6 RFC 7535
2001:10::/28 IPv6 Deprecated (previously ORCHID) RFC 4843
2001:20::/28 IPv6 ORCHIDv2 RFC 7343
2001:30::/28 IPv6 Drone Remote ID Protocol Entity Tags (DETs) Prefix RFC 9374
2001:db8::/32 IPv6 Documentation RFC 3849
2002::/16 IPv6 6to4 RFC 3056
2620:4f:8000::/48 IPv6 Direct Delegation for AS112 Service RFC 7534
3fff::/20 IPv6 Documentation RFC 9637
5f00::/16 IPv6 IPv6 Segment Routing (SRv6) SIDs draft-ietf-6man-sids-06
fc00::/7 IPv6 Unique-Local RFC 4193
fe80::/10 IPv6 Linked-Scoped Unicast RFC 4291

ASNs

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Block Description Reference
0 Reserved RFC 7607
112 Used by the AS112 project to sink misdirected DNS queries RFC 7534
23456 AS_TRANS RFC 6793
64496-64511 Documentation RFC 5398
64512-65534 Private Use RFC 6996
65535 Reserved RFC 7300
65536-65551 Documentation RFC 5398
4200000000-4294967294 Private Use RFC 6996
4294967295 Reserved RFC 7300

Sources

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Help pages Manual pages Special pages Other pages

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