Bogon IP addresses

Some IP addresses and ranges are set aside for special use, or not yet allocated.

These are called “bogon” IP addresses.

Bogons should never appear on the public internet. And because bogons aren't allocated to any server or network, they don't have any geolocation data.

In our IP geolocation API, we return a field privacy.is_bogon to indicate these IP addresses. We also have a full list of bogon addresses here.

IPv4 bogons

Netblock Description
0.0.0.0/8 “This” network
10.0.0.0/8 Private-use networks
100.64.0.0/10 Carrier-grade NAT
127.0.0.0/8 Loopback
127.0.53.53 Name collision occurrence
169.254.0.0/16 Link local
172.16.0.0/12 Private-use networks
192.0.0.0/24 IETF protocol assignments
192.0.2.0/24 TEST-NET-1
192.168.0.0/16 Private-use networks
198.18.0.0/15 Network interconnect device benchmark testing
198.51.100.0/24 TEST-NET-2
203.0.113.0/24 TEST-NET-3
224.0.0.0/4 Multicast
240.0.0.0/4 Reserved for future use
255.255.255.255/32 Limited broadcast

IPv6 bogons

Netblock Description
::/128 Unspecified address
::1/128 Loopback
::ffff:0:0/96 IPv4-mapped and translated addresses
64:ff9b::/96 IPv4/IPv6 translation
100::/64 Discard prefix
2001::/32 Teredo tunneling
2001:20::/28 ORCHIDv2
2001:db8::/32 Example address used in documentation
2002::/16 6to4
3fff::/20 Example address used in documentation
5f00::/16 IPv6 Segment Routing (SRv6)
fc00::/7 Unique local addresses
fe80::/10 Link-local address
fec0::/10 Site-local unicast
ff00::/8 Multicast