Supernetting (CIDR) Chart
- CIDR - Classless Inter-Domain Routing.
- Note: The Number of Class C networks must be contiguous.
Example. 192.168.0.0/22 represents the following block of addresses;
192.168.0.0, 192.168.1.0, 192.168.2.0 and 192.168.3.0.
| Class C |
| CIDR Block | Supernet Mask | Number of Class Cs | Number of Hosts |
| /14 | 255.252.0.0 | 1024 | 262144 |
| /15 | 255.254.0.0 | 512 | 131072 |
| /16 | 255.255.0.0 | 256 | 65536 |
| /17 | 255.255.128.0 | 128 | 32768 |
| /18 | 255.255.192.0 | 64 | 16384 |
| /19 | 255.255.224.0 | 32 | 8192 |
| /20 | 255.255.240.0 | 16 | 4096 |
| /21 | 255.255.248.0 | 8 | 2048 |
| /22 | 255.255.252.0 | 4 | 1024 |
| /23 | 255.255.254.0 | 2 | 512 |
| /24 | 255.255.255.0 | 1 | 254 |
| /25 | 255.255.255.128 | 1/2 | 126 |
| /26 | 255.255.255.192 | 1/4 | 62 |
Todd Murchison
< todd@murchison.net >