/15 subnet
Mask 255.254.0.0 · 131,070 usable hosts · 131,072 addresses
| Subnet mask | 255.254.0.0 |
|---|---|
| Wildcard mask | 0.1.255.255 |
| Binary mask | 11111111.11111110.00000000.00000000 |
| Network / host bits | 15 / 17 |
| Total addresses | 131,072 |
| Usable hosts | 131,070 |
| Per /8 · /16 · /24 | 128 · – · – |
| Example | 192.168.10.77/15 → network 192.168.0.0, hosts 192.168.0.1 – 192.169.255.254, broadcast 192.169.255.255 |
Where /15 is used
A /15 is a less common size; it sits between /14 (262,144 addresses) and /16 (65,536 addresses).
Block boundaries: a /15 must start at a multiple of 131,072 addresses. Calculate any specific address in the subnet calculator.
Neighbouring prefixes
Questions
How many hosts in a /15?
131,072 addresses, of which 131,070 are usable (the first is the network address and the last is broadcast).
What is the subnet mask for /15?
255.254.0.0. In binary: 11111111.11111110.00000000.00000000. The wildcard (inverse) mask is 0.1.255.255.