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IP/Subnet Calculator

Calculate IPv4 network, broadcast, and host range.

Migrated to main site

IP/Subnet Calculator

Calculate IPv4 network, broadcast, and usable host range.

IP address192.168.1.42
Prefix24
Subnet mask255.255.255.0
Network192.168.1.0
Broadcast192.168.1.255
First host192.168.1.1
Last host192.168.1.254
Total addresses256
Usable hosts254

Plain text result

IP address: 192.168.1.42
Prefix: 24
Subnet mask: 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

Privacy: this tool processes input locally in your browser without server upload.

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FAQ

Does IP/Subnet Calculator upload my data?

Most main-site tools process input locally in the browser. Website diagnostic tools that request public URLs explain the remote request scope in the tool UI.

Can I use IP/Subnet Calculator on mobile?

Tool pages use responsive layouts for phone, tablet, and desktop. Large file processing still depends on device memory and browser limits.

Can I download or copy the IP/Subnet Calculator result?

Migrated tools provide copy, download, or direct result views in the output area depending on the tool type.