Is this CIDR Calculator free to use?

Yes, CIDR Calculator is 100% free to use online with no installation or account required.

How do I use the CIDR Calculator?

Simply enter your values into the required input fields and click calculate to view the results instantly.

Yes, the calculator is fully responsive and compatible with Android, iOS, Windows, macOS, and Linux web browsers.

CIDR Calculator — Free Online Tool

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Calculate IPv4 subnet masks and host limits from CIDR prefix

Formula: Enter a CIDR prefix between 0 and 32 to calculate total IP addresses, usable hosts, subnet mask, and wildcard mask.

Subnet Parameter

CIDR Prefix (/n)

⚠️ For educational and technical network administration reference purposes only.

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