IP Class Addressing

Here is a brief summary for those who want's to know about IP addressing range within each class. IP is define as internet protocol. Here is a quick summary.


Class A (Supports 16 million hosts on each of 127 networks.)
First Octet Range, x : - 1 ~ 126
Subent Mask Permited : - 255.0.0.0 ~ 255.255.255.254
{By using subnet mask 255.0.0.0; Subnet bits 0; Max subnets 1;}
Host address range : - x.0.0.1 ~ x.255.255.254
Subnet ID : - x.0.0.0
Broadcast Address : - x.255.255.255

Class B
First Octet Range, x : - 128 ~ 191
Subent Mask Permited : - 255.255.0.0 ~ 255.255.255.254
{By using subnet mask 255.255.0.0; Subnet bits 0; Max subnets 1;}
Host address range : - x.0.0.1 ~ x.0.255.254
Subnet ID : - x.0.0.0
Broadcast Address : - x.0.255.255


Class C
First Octet Range, x : - 192 ~ 223
Subent Mask Permited : - 255.255.255.0 ~ 255.255.255.254
{By using subnet mask 255.255.255.0; Subnet bits 0; Max subnets 1;}
Host address range : - x.0.0.1 ~ x.0.0.254
Subnet ID : - x.0.0.0
Broadcast Address : - x.0.0.255