List of BOGON prefixes

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What Is a BOGON?

The term BOGON refers to any IP address prefix that should not be routable on the public internet. If you see a packet on the internet from one of these ranges, it’s almost certainly spoofed.

  • Bogon prefixes you should reject from the Internet
PrefixMore specificComment
0.0.0.0/0only the exact prefixDefault route
0.0.0.0/8any more specific prefixIANA – Local Identification
10.0.0.0/8any more specific prefixRFC 1918 – Private Use
127.0.0.0/8any more specific prefixIANA – Loopback
169.254.0.0/16any more specific prefixRFC 3927 – Link Local
172.16.0.0/12any more specific prefixRFC 1918 – Private Use
192.0.2.0/24any more specific prefixRFC 5737 – TEST-NET-1
192.88.99.0/24any more specific prefixRFC 3068 – 6to4 prefix
192.168.0.0/16any more specific prefixRFC 1918 – Private Use
198.18.0.0/15any more specific prefixRFC 2544 – Network Interconnect Device Benchmark Testing
198.51.100.0/24any more specific prefixRFC 5737 – TEST-NET-2
203.0.113.0/24any more specific prefixRFC 5737 – TEST-NET-3
224.0.0.0/3any more specific prefixRFC 5771 – Multcast (formerly Class D)
100.64.0.0/10any more specific prefixRFC 6598 – Shared Address Space
::/0only the exact prefixDefault route
::/8any more specific prefixloopback, unspecified, v4-mapped
64:ff9b::/96any more specific prefixRFC 6052 – IPv4-IPv6 Translation
100::/8any more specific prefixRFC 6666 – reserved for Discard-Only Address Block
200::/7any more specific prefixRFC 4048 – Reserved by IETF
400::/6any more specific prefixRFC 4291 – Reserved by IETF
800::/5any more specific prefixRFC 4291 – Reserved by IETF
1000::/4any more specific prefixRFC 4291 – Reserved by IETF
2001::/33any more specific prefixRFC 4380 – Teredo prefix
2001:0:8000::/33any more specific prefixRFC 4380 – Teredo prefix
2001:2::/48any more specific prefixRFC 5180 – Benchmarking
2001:3::/32any more specific prefixRFC 7450 – Automatic Multicast Tunneling
2001:10::/28any more specific prefixRFC 4843 – Deprecated ORCHID
2001:20::/28any more specific prefixRFC 7343 – ORCHIDv2
2001:db8::/32any more specific prefixRFC 3849 – NON-ROUTABLE range to be used for documentation purpose
2002::/16any more specific prefixRFC 3068 – 6to4 prefix
3ffe::/16any more specific prefixRFC 5156 – used for the 6bone but was returned
4000::/3any more specific prefixRFC 4291 – Reserved by IETF
5f00::/8any more specific prefixRFC 5156 – used for the 6bone but was returned
6000::/3any more specific prefixRFC 4291 – Reserved by IETF
8000::/3any more specific prefixRFC 4291 – Reserved by IETF
a000::/3any more specific prefixRFC 4291 – Reserved by IETF
c000::/3any more specific prefixRFC 4291 – Reserved by IETF
e000::/4any more specific prefixRFC 4291 – Reserved by IETF
f000::/5any more specific prefixRFC 4291 – Reserved by IETF
f800::/6any more specific prefixRFC 4291 – Reserved by IETF
fc00::/7any more specific prefixRFC 4193 – Unique Local Unicast
fe80::/10any more specific prefixRFC 4291 – Link Local Unicast
fec0::/10any more specific prefixRFC 4291 – Reserved by IETF
ff00::/8any more specific prefixRFC 4291 – Multicast
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