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Class address ranges:

• Class A = 1.0.0.0 to 126.0.0.0
• Class B = 128.0.0.0 to 191.255.0.0
• Class C = 192.0.1.0 to 223.255.255.0

Reserved address ranges for private (non-routed) use

• 10.0.0.0 -> 10.255.255.255
• 172.16.0.0 -> 172.31.255.255
• 192.168.0.0 -> 192.168.255.255

Other reserved addresses:

• 127.0.0.0 is reserved for loopback and IPC on the local host
• 224.0.0.0 -> 239.255.255.255 is reserved for multicast addresses