/7 subnet
Mask 254.0.0.0 · 33,554,430 usable hosts · 33,554,432 addresses
| Subnet mask | 254.0.0.0 |
|---|---|
| Wildcard mask | 1.255.255.255 |
| Binary mask | 11111110.00000000.00000000.00000000 |
| Network / host bits | 7 / 25 |
| Total addresses | 33,554,432 |
| Usable hosts | 33,554,430 |
| Example | 192.168.10.77/7 → network 192.0.0.0, hosts 192.0.0.1 – 193.255.255.254, broadcast 193.255.255.255 |
Where /7 is used
A /7 is a less common size; it sits between /6 (67,108,864 addresses) and /8 (16,777,216 addresses).
Block boundaries: a /7 must start at a multiple of 33,554,432 addresses. Calculate any specific address in the subnet calculator.
Neighbouring prefixes
Questions
How many hosts in a /7?
33,554,432 addresses, of which 33,554,430 are usable (the first is the network address and the last is broadcast).
What is the subnet mask for /7?
254.0.0.0. In binary: 11111110.00000000.00000000.00000000. The wildcard (inverse) mask is 1.255.255.255.