Private IP address ranges , sometimes called reserve ranges, are for internal devices only. This is the list along with a few other special ranges that are common and should be known.
CLASS A
10.0.0.0 – 10.255.255.255.255
8 network bits and 24 hots bits
subnet mask = 255.0.0.0
CLASS B
172.16.0.0 – 172.31.255.255
16 network bits and 16 host bits
subnet mask = 255.255.0.0
CLASS C
192.168.0.0 – 192.168.255.255
24 network bits and 8 host bits
subnet mask = 255.255.255.0
CLASS D (Multicasting)
224.0.0.0 – 239.255.255.255 (Reserved for TV networks)
LOOPBACK
127.0.0.1 – 127.255.255.255
Used for network testing. Specifically, it tests a computer’s TCP/IP network software driver to ensure it is working properly.
APIPA (Automatic IP Addressing)
169.254.0.1 – 169.254.255.25