Example: 192.168.220.0/24 |
CIDR Cheat Sheet | ||
Notation | Netmask | # of IP Addresses |
/32 | 255.255.255.255 | 1 |
/31 | 255.255.255.254 | 2 |
/30 | 255.255.255.252 | 4 |
/29 | 255.255.255.248 | 8 |
/28 | 255.255.255.240 | 16 |
/27 | 255.255.255.224 | 32 |
/26 | 255.255.255.192 | 64 |
/25 | 255.255.255.128 | 128 |
/24 | 255.255.255.0 | 256 |
/23 | 255.255.254.0 | 256*2 |
/22 | 255.255.252.0 | 256*4 |
/21 | 255.255.248.0 | 256*8 |
/20 | 255.255.240.0 | 256*16 |
/19 | 255.255.224.0 | 256*32 |
/18 | 255.255.192.0 | 256*64 |
/17 | 255.255.128.0 | 256*128 |
/16 | 255.255.0.0 | 65536 |
/15 | 255.254.0.0 | 65536*2 |
/14 | 255.252.0.0 | 65536*4 |
/13 | 255.248.0.0 | 65536*8 |
/12 | 255.240.0.0 | 65536*16 |
/11 | 255.224.0.0 | 65536*32 |
/10 | 255.192.0.0 | 65536*64 |
/9 | 255.128.0.0 | 65536*128 |
/8 | 255.0.0.0 | 16777216 |
/7 | 254.0.0.0 | 16777216*2 |
/6 | 252.0.0.0 | 16777216*4 |
/5 | 248.0.0.0 | 16777216*8 |
/4 | 240.0.0.0 | 16777216*16 |
/3 | 224.0.0.0 | 16777216*32 |
/2 | 192.0.0.0 | 16777216*64 |
/1 | 128.0.0.0 | 16777216*128 |
/0 | 0.0.0.0 | 4294967295 |