Subnets

* IP’s Per Net include the network and broadcast IP
Network Mask Mask Bits Next Net IP’s Per Net *
255.0.0.0 8 A+1.B.C.D 16,777,216
255.128.0.0 9 A.B+128.C.D 8,388,608
255.192.0.0 10 A.B+64.C.D 4,194,304
255.224.0.0 11 A.B+32.C.D 2,097,152
255.240.0.0 12 A.B+16.C.D 1,048,576
255.248.0.0 13 A.B+8.C.D 524,288
255.252.0.0 14 A.B+4.C.D 262,144
255.254.0.0 15 A.B+2.C.D 131,072
255.255.0.0 16 A.B+1.C.D 65,536
255.255.128.0 17 A.B.C+128.D 32,768
255.255.192.0 18 A.B.C+64.D 16,384
255.255.224.0 19 A.B.C+32.D 8,192
255.255.240.0 20 A.B.C+16.D 4,096
255.255.248.0 21 A.B.C+8.D 2,048
255.255.252.0 22 A.B.C+4.D 1,024
255.255.254.0 23 A.B.C+2.D 512
255.255.255.0 24 A.B.C+1.D 256
255.255.255.128 25 A.B.C.D+128 128
255.255.255.192 26 A.B.C.D+64 64
255.255.255.224 27 A.B.C.D+32 32
255.255.255.240 28 A.B.C.D+16 16
255.255.255.248 29 A.B.C.D+8 8
255.255.255.252 30 A.B.C.D+4 4
255.255.255.254 31 A.B.C.D+2 2
255.255.255.255 32 A.B.C.D+1 1

 

RFC-1918 Private Address Ranges

Start End Network Mask Mask Bits Purpose
10.0.0.0 10.255.255.255 255.0.0.0 8 Private Class A
169.254.0.0 169.254.255.255 255.255.0.0 16 Automatic Private Addressing
172.16.0.0 172.31.255.255 255.240.0.0 12 Private Class B
192.168.0.0 192.168.255.255 255.255.0.0 16 Private Class C