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IP Subnet Calculator

Work out network, broadcast and host ranges from CIDR. Everything happens locally in your browser, so it is fast and completely private. Nothing you enter is uploaded.

Free · no sign-up Developer

About the IP Subnet Calculator

Work out network, broadcast and host ranges from CIDR. Everything happens locally in your browser, so it is fast and completely private. Nothing you enter is uploaded.

Frequently asked questions

Is this tool free?
Yes — it is completely free, with no sign-up or watermark.
Is my data private?
Yes. It runs entirely in your browser, so nothing you paste or upload ever leaves your device.

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