/4 subnet
Mask 240.0.0.0 · 268,435,454 usable hosts · 268,435,456 addresses
| Subnet mask | 240.0.0.0 |
|---|---|
| Wildcard mask | 15.255.255.255 |
| Binary mask | 11110000.00000000.00000000.00000000 |
| Network / host bits | 4 / 28 |
| Total addresses | 268,435,456 |
| Usable hosts | 268,435,454 |
| Example | 192.168.10.77/4 → network 192.0.0.0, hosts 192.0.0.1 – 207.255.255.254, broadcast 207.255.255.255 |
Where /4 is used
A /4 is a less common size; it sits between /3 (536,870,912 addresses) and /5 (134,217,728 addresses).
Block boundaries: a /4 must start at a multiple of 268,435,456 addresses. Calculate any specific address in the subnet calculator.
Neighbouring prefixes
Questions
How many hosts in a /4?
268,435,456 addresses, of which 268,435,454 are usable (the first is the network address and the last is broadcast).
What is the subnet mask for /4?
240.0.0.0. In binary: 11110000.00000000.00000000.00000000. The wildcard (inverse) mask is 15.255.255.255.