IPv4 Subnetting

Interactive network calculator

Network and host bits

24 network / 8 host
11000000101010000000000110000010
NetworkHost
IPv4 address
192.168.1.130
Subnet mask
255.255.255.0
Wildcard mask
0.0.0.255
Network address
192.168.1.0
First usable host
192.168.1.1
Last usable host
192.168.1.254
Broadcast address
192.168.1.255
Total addresses
256
Usable hosts
254

Subnet ranges

Equal-size subnetting uses powers of two.

/24 → 4 × /26

Selected subnet bits

Compare the original network, borrowed subnet, and remaining host bits.

11000000101010000000000100000000
Original networkBorrowed subnetHost
Network
192.168.1.0/26
Usable range
192.168.1.1 – 192.168.1.62
Broadcast
192.168.1.63
SubnetNetworkUsable host rangeBroadcastAddresses
192.168.1.0/26192.168.1.1 – 192.168.1.62192.168.1.6364
192.168.1.64/26192.168.1.65 – 192.168.1.126192.168.1.12764
192.168.1.128/26192.168.1.129 – 192.168.1.190192.168.1.19164
192.168.1.192/26192.168.1.193 – 192.168.1.254192.168.1.25564