Term | Definition |
/32 | 1 single ip, subnet mask 255.255.255.255, available subnets 254 |
/31 | 2 usable/host with a point to point, subnet mask 255.255.255.254, available subnets 128 |
/30 | 2 usable/hosts, subnet mask 255.255.255.252, available subnets 64 |
/29 | 6 usable/hosts, subnet mask 255.255.255.248, available subnets 32 |
/28 | 14 usable/hosts, subnet mask 255.255.255.240, available subnets 16 |
/27 | 30 usable/hosts, subnet mask 255.255.255.224, available subnets 8 |
/26 | 62 usable/hosts, subnet mask 255.255.255.192, available subnets 4 |
/25 | 126 usable/hosts, subnet mask 255.255.255.128, available subnets 2 |
/24 | 254 usable/hosts, subnet mask 255.255.255.0, available subnets 1 |
/23 | 510 usable/hosts, subnet mask 255.255.254.0 |
/22 | 1022 usable/hosts, subnet mask 255.255.252.0 |
/21 | 2046 usable/hosts, subnet mask 255.255.248.0 |
/20 | 4094 usable/hosts, subnet mask 255.255.240.0 |
/19 | 8190 usable/hosts, subnet mask 255.255.224.0 |
/18 | 16,382 usable/hosts, subnet mask 255.255.192.0 |
/17 | 32,766 usable/hosts, subnet mask 255.255.128.0 |
/16 | 65,534 usable/hosts, subnet mask 255.255.0.0 |