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Network Tools

Plan and verify IP networks. The subnet calculator turns an IP address and a CIDR prefix or netmask into the full picture, entirely in your browser. Nothing you enter leaves your device.

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Do the Subnet Math Instantly

Answers appear as you type, with every calculation done locally in your browser.

Subnet Calculator

Turn an IP and CIDR prefix or netmask into the full picture: network, broadcast, host range, and binary.

  • Network, broadcast, wildcard mask
  • Usable host range and counts
  • Runs fully in your browser
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This tool runs entirely in your browser. No data is transmitted or stored.

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