Subnet Calculator
Convert IP + prefix into network, broadcast, mask and usable hosts
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Common prefixes
Subnet mask
255.255.255.0
wildcard 0.0.0.255
Usable hosts
254
range 192.168.1.1 – 192.168.1.254
Network address
192.168.1.0
all host bits zero
Broadcast address
192.168.1.255
all host bits one
Usable range
192.168.1.1 … 192.168.1.254
for 254 hosts
Network / host bits
nnnnnnnnnnnnnnnnnnnnnnnnhhhhhhhh
network (prefix) bits host bits
Binary breakdown
11000000.10101000.00000001.00100101 (host)
11000000.10101000.00000001.00000000 (network)
11000000.10101000.00000001.11111111 (broadcast)