What is a classful IPv4 address?
The definitions of what this is will be included below. This will include the zero subnet or as many people in the industry will call it ‘subnet-zero.’
These definitions will also be using a CIDR notation.
Directly below are unicast address space – this is the most important addressing used.
Class A 18.104.22.168/8 – 22.214.171.124/8
Class B 126.96.36.199/16 – 188.8.131.52/16
Class C 192.0.0.0/24 – 184.108.40.206/24
Now this is multicast address space – typically, this is not as important until we start using VOIP and Video applications within our network.
Class D 220.127.116.11 – 18.104.22.168
Class E 240.0.0.0 – 255.255.255.255