CIDR Table

CIDR Dotted Decimal WildCard Mask No. of Addresses No. of Networks
/32 255.255.255.255 0.0.0.0 1 4,294,967,296
/31 255.255.255.254 0.0.0.1 2 2,147,483,648
/30 255.255.255.252 0.0.0.3 4 1,073,741,824
/29 255.255.255.248 0.0.0.7 8 536,870,912
/28 255.255.255.240 0.0.0.15 16 268,435,456
/27 255.255.255.224 0.0.0.31 32 134,217,728
/26 255.255.255.192 0.0.0.63 64 67,108,864
/25 255.255.255.128 0.0.0.127 128 33,554,432
/24 255.255.255.0 0.0.0.255 256 16,777,216
/23 255.255.254.0 0.0.1.255 512 8,388,608
/22 255.255.252.0 0.0.3.255 1,024 4,194,304
/21 255.255.248.0 0.0.7.255 2,048 2,097,152
/20 255.255.240.0 0.0.15.255 4,096 1,048,576
/19 255.255.224.0 0.0.31.255 8,192 524,288
/18 255.255.192.0 0.0.63.255 16,384 262,144
/17 255.255.128.0 0.0.127.255 32,768 131,072
/16 255.255.0.0 0.0.255.255 65,536 65,536
/15 255.254.0.0 0.1.255.255 131,072 32,768
/14 255.252.0.0 0.3.255.255 262,144 16,384
/13 255.248.0.0 0.7.255.255 524,288 8,192
/12 255.240.0.0 0.15.255.255 1,048,576 4,096
/11 255.224.0.0 0.31.255.255 2,097,152 2,048
/10 255.192.0.0 0.63.255.255 4,194,304 1,024
/9 255.128.0.0 0.127.255.255 8,388,608 512
/8 255.0.0.0 0.255.255.255 16,777,216 256
/7 254.0.0.0 1.255.255.255 33,554,432 128
/6 252.0.0.0 3.255.255.255 67,108,864 64
/5 248.0.0.0 7.255.255.255 134,217,728 32
/4 240.0.0.0 15.255.255.255 268,435,456 16
/3 224.0.0.0 31.255.255.255 536,870,912 8
/2 192.0.0.0 63.255.255.255 1,073,741,824 4
/1 128.0.0.0 127.255.255.255 2,147,483,648 2
/0 0.0.0.0 255.255.255.255 4,294,967,296 1