CIDR Block
CIDR Block Network Broadcast Subnet Mask No. IP’s
10.20.0.0/32 10.20.0.0 – 10.20.0.0 255.255.255.255 1
10.20.0.0/31 10.20.0.0 – 10.20.0.1 255.255.255.254 2
10.20.0.0/30 10.20.0.0 – 10.20.0.3 255.255.255.252 4
10.20.0.0/29 10.20.0.0 – 10.20.0.7 255.255.255.248 8
10.20.0.0/28 10.20.0.0 – 10.20.0.15 255.255.255.240 16
10.20.0.0/27 10.20.0.0 – 10.20.0.31 255.255.255.224 32
10.20.0.0/26 10.20.0.0 – 10.20.0.63 255.255.255.192 64
10.20.0.0/25 10.20.0.0 – 10.20.0.127 255.255.255.128 128
10.20.0.0/24 10.20.0.0 – 10.20.0.255 255.255.255.0 256
10.20.0.0/23 10.20.0.0 – 10.20.1.255 255.255.254.0 512
10.20.0.0/22 10.20.0.0 – 10.20.3.255 255.255.252.0 1024
10.20.0.0/21 10.20.0.0 – 10.20.7.255 255.255.248.0 2048
10.20.0.0/20 10.20.0.0 – 10.20.15.255 255.255.240.0 4096
10.20.0.0/19 10.20.0.0 – 10.20.31.255 255.255.224.0 8192
10.20.0.0/18 10.20.0.0 – 10.20.63.255 255.255.192.0 16384
10.20.0.0/17 10.20.0.0 – 10.20.127.255 255.255.128.0 32768
10.20.0.0/16 10.20.0.0 – 10.20.255.255 255.255.0.0 65536
10.20.0.0/15 10.20.0.0 – 10.21.255.255 255.254.0.0 131072
10.20.0.0/14 10.20.0.0 – 10.23.255.255 255.252.0.0 262144
10.16.0.0/13 10.16.0.0 – 10.23.255.255 255.248.0.0 524288
10.16.0.0/12 10.16.0.0 – 10.31.255.255 255.240.0.0 1048576
10.0.0.0/11 10.0.0.0 – 10.31.255.255 255.224.0.0 2097152
10.0.0.0/10 10.0.0.0 – 10.63.255.255 255.192.0.0 4194304
10.0.0.0/9 10.0.0.0 – 10.127.255.255 255.128.0.0 8388608
10.0.0.0/8 10.0.0.0 – 10.255.255.255 255.0.0.0 16777216
10.0.0.0/7 10.0.0.0 – 11.255.255.255 254.0.0.0 33554432
8.0.0.0/6 8.0.0.0 – 11.255.255.255 252.0.0.0 67108864
8.0.0.0/5 8.0.0.0 – 15.255.255.255 248.0.0.0 134217728
0.0.0.0/4 0.0.0.0 – 15.255.255.255 240.0.0.0 268435456
0.0.0.0/3 0.0.0.0 – 31.255.255.255 224.0.0.0 536870912
0.0.0.0/2 0.0.0.0 – 63.255.255.255 192.0.0.0 1073741824
0.0.0.0/1 0.0.0.0 – 127.255.255.255 128.0.0.0 2147483648
0.0.0.0/0 0.0.0.0 – 255.255.255.255 0.0.0.0 4294967296