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IPv4 network classes
268,435,456ERFC 1700Reserved240.0.0.0/4
240.0.0.0 -
255.255.255.255
268,435,456DRFC 3171Multicast224.0.0.0/4
224.0.0.0 -
239.255.255.255
131,072CRFC 2544Network Device Benchmark198.18.0.0/15
198.18.0.0 - 198.19.255.255
65,536CRFC 1918Private IP addresses192.168.0.0/16
192.168.0.0 -
192.168.255.255
256CRFC 3068IPv6 to IPv4 relay Anycast192.88.99.0/24
192.88.99.0 - 192.88.99.255
256CRFC 3330Documentation and Examples192.0.2.0/24
192.0.2.0 - 192.0.2.255
1,048,576BRFC 1918Private IP addresses172.16.0.0/12
172.16.0.0 - 172.31.255.255
65,536BRFC 3330Zeroconf169.254.0.0/16
169.254.0.0 -
169.254.255.255
16,777,216ARFC 1700Localhost Loopback Address127.0.0.0/8
127.0.0.0 -
127.255.255.255
16,777,216ARFC 1918Private IP addresses10.0.0.0/8
10.0.0.0 - 10.255.255.255
16,777,216ARFC 1700Zero Addresses0.0.0.0/8
0.0.0.0 - 0.255.255.255
Total # of addressesClassRFCPurposeCIDR EquivalentAddresses
Your IP address identifies the “neighborhood” your node is in.
“Private IP addresses” are not assigned by the IANA (Internet Assigned
Numbers Authority)
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