IP Address and Subnetting

Network Classes


0 – Gateway


Class A
1-126 CIDR /8

Private:10.0.0.0 – 10.255.255.255 /8


127 – loopback


Class B
128-191 CIDR /16

Private:172.16.0.0 – 172.31.255.255 /12


Class C
192-223 CIDR /24

Private:192.168.0.0 – 192.168.255.255 /16


Class D
224-239 CIDR /N/A


Class E
240-255 CIDR /N/A


Bit Values

128,64,32,16,8,4,2,1


IP Calc

network