====== CIDR ======
The first address on any block is the network address, and the last address is the broadcast, hence why there are always two fewer actual hosts than potential hosts. 

^ Prefix ^ Potential hosts ^ Actual hosts ^ Netmask ^ Subnets ^ Address range ^ Broadcast address ^
| /31 | 2 | 0 | 255.255.255.254 | 128 | | |
| /30 | 4 |  | 255.255.255.252 | 64 | | |
| /29 | 8 |  | 255.255.255.248 | 32 | | |
| /28 | 16 |  | 255.255.255.240 | 16 | | |
| /27 | 32 |  | 255.255.255.224 | 8 | | |
| /26 | 64 |  | 255.255.255.192 | 4 | | |
| /25 | 128 |  | 255.255.255.128 | 2 | | |
| /24 | 256 |  | 255.255.255.0 | 1 | | |
| /23 | 512 |  | 255.255.254.0 | 128 | | |
| /22 | 1024 |  | 255.255.252.0 | 64 | | |
| /21 | 2048 |  | 255.255.248.0 | 32 | | |
| /20 | 4096 |  | 255.255.240.0 | 16 | | |
| /19 | 8192 |  | 255.255.224.0 | 8 | | |
| /18 | 16384 |  | 255.255.192.0 | 4 | | |
| /17 | 32768 |  | 255.255.128.0 | 2 | | |
| /16 | 65536 |  | 255.255.0.0 | 1 | | |
| /15 | 131072 |  | 255.254.0.0 | 128 | | |
| /14 | 262144 |  | 255.252.0.0 | 64 | | |
| /13 | 524288 |  | 255.248.0.0 | 32 | | |
| /12 | 1048576 |  | 255.240.0.0 | 16 | | |
| /11 | 2097152 |  | 255.224.0.0 | 8 | | |
| /10 | 4194304 |  | 255.192.0.0 | 4 | | |
| /9 | 8388608 |  | 255.128.0.0 | 2 | | |
| /8 | 16777216 |  | 255.0.0.0 | 1 | | |
| /7 | 33554432 |  | 254.0.0.0 | 128 | | |
| /6 | 67108864 |  | 252.0.0.0 | 64 | | |
| /5 | 134217728 |  | 248.0.0.0 | 32 | | |
| /4 | 268435456 |  | 240.0.0.0 | 16 | | |
| /3 | 536870912 |  | 224.0.0.0 | 8 | | |
| /2 | 1073741824 |  | 192.0.0.0 | 4 | | |
| /1 | 2147483648 |  | 128.0.0.0 | 2 | | |
| /0 | 4294967296 |  | 0.0.0.0 | 1 | | |