Network Notes
Subnet Cheat Sheet
| CIDR |
Addresses |
Hosts |
Netmask |
Amount of a Class C |
| /30 |
4 |
2 |
255.255.255.252 |
1/64 |
| /29 |
8 |
6 |
255.255.255.248 |
1/32 |
| /28 |
16 |
14 |
255.255.255.240 |
1/16 |
| /27 |
32 |
30 |
255.255.255.224 |
1/8 |
| /26 |
64 |
62 |
255.255.255.192 |
1/4 |
| /25 |
128 |
126 |
255.255.255.128 |
1/2 |
| /24 |
256 |
254 |
255.255.255.0 |
1 |
| /23 |
512 |
510 |
255.255.254.0 |
2 |
| /22 |
1024 |
1022 |
255.255.252.0 |
4 |
| /21 |
2048 |
2046 |
255.255.248.0 |
8 |
| /20 |
4096 |
4094 |
255.255.240.0 |
16 |
| /19 |
8192 |
8190 |
255.255.224.0 |
32 |
| /18 |
16384 |
16382 |
255.255.192.0 |
64 |
| /17 |
32768 |
32766 |
255.255.128.0 |
128 |
| /16 |
65536 |
65534 |
255.255.0.0 |
256 |