/19 subnet
Mask 255.255.224.0 · 8,190 usable hosts · 8,192 addresses
| Subnet mask | 255.255.224.0 |
|---|---|
| Wildcard mask | 0.0.31.255 |
| Binary mask | 11111111.11111111.11100000.00000000 |
| Network / host bits | 19 / 13 |
| Total addresses | 8,192 |
| Usable hosts | 8,190 |
| Per /8 · /16 · /24 | 2,048 · 8 · – |
| Example | 192.168.10.77/19 → network 192.168.0.0, hosts 192.168.0.1 – 192.168.31.254, broadcast 192.168.31.255 |
Where /19 is used
A /19 is a less common size; it sits between /18 (16,384 addresses) and /20 (4,096 addresses).
Block boundaries: a /19 must start at a multiple of 8,192 addresses. Calculate any specific address in the subnet calculator.
Neighbouring prefixes
Questions
How many hosts in a /19?
8,192 addresses, of which 8,190 are usable (the first is the network address and the last is broadcast).
What is the subnet mask for /19?
255.255.224.0. In binary: 11111111.11111111.11100000.00000000. The wildcard (inverse) mask is 0.0.31.255.