The following table shows the IPv4 network subnet prefixes, subnet masks, and the number of usable hosts.
|Prefix size||Network mask||Available subnets||Usable hosts per subnet||Total usable hosts|
* for point-to-point links only
In a subnet the following two addresses cannot be assigned to hosts:
- the first address is the address of the subnet,
- the last address is the broadcast address to all hosts.