A
1-126
B
128-191
C
192-223
D
224-239
Multicast
No subnet
E
240-255
Reserved for experimental
Private A
10.0.0.0 - 10.255.255.255
Private B
172.16.0.0 - 172.31.255.255
Private C
192.168.0.0 - 192.168.255.255
APIPA
Class B
169.254.0.0 - 169.254.255.255
Loopback
Class A
127.0.0.1 - 127.255.255.255
IPv6 link local
Starts with FE80, last half uses EUI-64
IPv6 globally routable unicast
Starts with 2000-3999
IPv6 multicast
Starts with FF