IPv4 Subnet Calculator

Calculate IPv4 subnet details and address ranges.

Runs in your browser All processing happens locally. Your data never leaves this device.
Netmask
255.255.255.0
Network
192.168.1.0
Broadcast
192.168.1.255
First host
192.168.1.1
Last host
192.168.1.254
Total addresses
256
Usable hosts
254
Wildcard
0.0.0.255

About this tool

Overview, usage, examples, FAQ, and notes will be provided here per language.

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