CIDR block IP range(network - broadcast) Subnet Mask IP Quantity --------------------------------------------------------------------------- 192.168.1.1/32 192.168.1.1 - 192.168.1.1 255.255.255.255 1 192.168.1.0/31 192.168.1.0 - 192.168.1.1 255.255.255.254 2 192.168.1.0/30 192.168.1.0 - 192.168.1.3 255.255.255.252 4 192.168.1.0/29 192.168.1.0 - 192.168.1.7 255.255.255.248 8 192.168.1.0/28 192.168.1.0 - 192.168.1.15 255.255.255.240 16 192.168.1.0/27 192.168.1.0 - 192.168.1.31 255.255.255.224 32 192.168.1.0/26 192.168.1.0 - 192.168.1.63 255.255.255.192 64 192.168.1.0/25 192.168.1.0 - 192.168.1.127 255.255.255.128 128 192.168.1.0/24 192.168.1.0 - 192.168.1.255 255.255.255.0 256 192.168.0.0/23 192.168.0.0 - 192.168.1.255 255.255.254.0 512 192.168.0.0/22 192.168.0.0 - 192.168.3.255 255.255.252.0 1024 192.168.0.0/21 192.168.0.0 - 192.168.7.255 255.255.248.0 2048 192.168.0.0/20 192.168.0.0 - 192.168.15.255 255.255.240.0 4096 192.168.0.0/19 192.168.0.0 - 192.168.31.255 255.255.224.0 8192 192.168.0.0/18 192.168.0.0 - 192.168.63.255 255.255.192.0 16384 192.168.0.0/17 192.168.0.0 - 192.168.127.255 255.255.128.0 32768 192.168.0.0/16 192.168.0.0 - 192.168.255.255 255.255.0.0 65536 192.168.0.0/15 192.168.0.0 - 192.169.255.255 255.254.0.0 131072 192.168.0.0/14 192.168.0.0 - 192.171.255.255 255.252.0.0 262144 192.168.0.0/13 192.168.0.0 - 192.175.255.255 255.248.0.0 524288 192.160.0.0/12 192.160.0.0 - 192.175.255.255 255.240.0.0 1048576 192.160.0.0/11 192.160.0.0 - 192.191.255.255 255.224.0.0 2097152 192.128.0.0/10 192.128.0.0 - 192.191.255.255 255.192.0.0 4194304 192.128.0.0/9 192.128.0.0 - 192.255.255.255 255.128.0.0 8388608 192.0.0.0/8 192.0.0.0 - 192.255.255.255 255.0.0.0 16777216 192.0.0.0/7 192.0.0.0 - 193.255.255.255 254.0.0.0 33554432 192.0.0.0/6 192.0.0.0 - 195.255.255.255 252.0.0.0 67108864 192.0.0.0/5 192.0.0.0 - 199.255.255.255 248.0.0.0 134217728 192.0.0.0/4 192.0.0.0 - 207.255.255.255 240.0.0.0 268435456 192.0.0.0/3 192.0.0.0 - 223.255.255.255 224.0.0.0 536870912 192.0.0.0/2 192.0.0.0 - 255.255.255.255 192.0.0.0 1073741824 128.0.0.0/1 128.0.0.0 - 255.255.255.255 128.0.0.0 2147483648