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Subnet and CIDR Calculator online

Paste an IPv4 address with a CIDR prefix and inspect its network block without external services.

Local processing

LOCAL PROCESSING

Everything happens in your browser

The file and text never leave your device.

What you can do with Subnet and CIDR Calculator

Get IPv4 network, mask, broadcast and range. Use the tool controls to adjust the operation and review the result before copying or downloading it.

How it works and what to consider

The calculation covers /0 through /32 and handles /31 and /32 with their host rules.

FREQUENTLY ASKED QUESTIONS

What result does Subnet and CIDR Calculator provide?

Get IPv4 network, mask, broadcast and range. The calculation covers /0 through /32 and handles /31 and /32 with their host rules.

Where is the information for Subnet and CIDR Calculator processed?

The operation runs locally in your browser. PriviTools does not receive the tool input, file or result.

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