
For setting up IP networks and detecting incorrect addresses.
CIDR Binary Decimal Addresses ---------------------------------------------------------------------- /32 11111111.11111111.11111111.11111111 255.255.255.255 1 /31 11111111.11111111.11111111.11111110 255.255.255.254 2 /30 11111111.11111111.11111111.11111100 255.255.255.252 4 /29 11111111.11111111.11111111.11111000 255.255.255.248 8 /28 11111111.11111111.11111111.11110000 255.255.255.240 16 /27 11111111.11111111.11111111.11100000 255.255.255.224 32 /26 11111111.11111111.11111111.11000000 255.255.255.192 64 /25 11111111.11111111.11111111.10000000 255.255.255.128 128 /24 11111111.11111111.11111111.00000000 255.255.255.0 256 /23 11111111.11111111.11111110.00000000 255.255.254.0 512 /22 11111111.11111111.11111100.00000000 255.255.252.0 1024 /21 11111111.11111111.11111000.00000000 255.255.248.0 2048 /20 11111111.11111111.11110000.00000000 255.255.240.0 4096 /19 11111111.11111111.11100000.00000000 255.255.224.0 8192 /18 11111111.11111111.11000000.00000000 255.255.192.0 16384 /17 11111111.11111111.10000000.00000000 255.255.128.0 32768 /16 11111111.11111111.00000000.00000000 255.255.0.0 65536 /15 11111111.11111110.00000000.00000000 255.254.0.0 131072 /14 11111111.11111100.00000000.00000000 255.252.0.0 262144 /13 11111111.11111000.00000000.00000000 255.248.0.0 524288 /12 11111111.11110000.00000000.00000000 255.240.0.0 1048576 /11 11111111.11100000.00000000.00000000 255.224.0.0 2097152 /10 11111111.11000000.00000000.00000000 255.192.0.0 4194304 /9 11111111.10000000.00000000.00000000 255.128.0.0 8388608 /8 11111111.00000000.00000000.00000000 255.0.0.0 16777216