/3 subnet
Mask 224.0.0.0 · 536,870,910 usable hosts · 536,870,912 addresses
| Subnet mask | 224.0.0.0 |
|---|---|
| Wildcard mask | 31.255.255.255 |
| Binary mask | 11100000.00000000.00000000.00000000 |
| Network / host bits | 3 / 29 |
| Total addresses | 536,870,912 |
| Usable hosts | 536,870,910 |
| Example | 192.168.10.77/3 → network 192.0.0.0, hosts 192.0.0.1 – 223.255.255.254, broadcast 223.255.255.255 |
Where /3 is used
A /3 is a less common size; it sits between /2 (1,073,741,824 addresses) and /4 (268,435,456 addresses).
Block boundaries: a /3 must start at a multiple of 536,870,912 addresses. Calculate any specific address in the subnet calculator.
Neighbouring prefixes
Questions
How many hosts in a /3?
536,870,912 addresses, of which 536,870,910 are usable (the first is the network address and the last is broadcast).
What is the subnet mask for /3?
224.0.0.0. In binary: 11100000.00000000.00000000.00000000. The wildcard (inverse) mask is 31.255.255.255.