Classful Addressing

The following classes are defined:

• Class A: 10.0.0.0 - 10.255.255.255 / 255.0.0.0
• Class B: 172.16.0.0 - 172.31.255.255 / 255.255.0.0
• Class C: 192.168.0.0 - 192.168.255.255 / 255.255.255.0
• APIPA 169.254.0.0 - 169.254.255.255 (as of July 2001)

Also presented as:

• 10.0.0.0 - 10.255.255.255 / 8
• 172.16.0.0 - 172.31.255.255 / 16
• 192.168.0.0 - 192.168.255.255 / 24
• 169.254.0.0 - 169.254.255.255 (as of July 2001)