IP(IPv4) Address Classes Cheat Sheet

Class	Range	Leading Bits	Features
A	1-127	0	Network.Host.Host.Host
B	128-191	10	Network.Network.Host.Host
C	192-239	110	Network.Network.Network.Host
D	240-247	1110	Reserved for multicast
E	248-255	11110	Reserved for research

Note:

• Network 127 is reserved for loopback testing and internal testing
• Network / Host indicates one octet (eight bits) [Read more about What is Octet?]

Explore more cheat sheets:

• Default Subnet Masks Cheat Sheet
• Private Address Space Cheat Sheet

Explore you concept:

• What is IP Address?
• Types of IP Address
• Classes of IP Address
• IP Address Classification