Web & SEO

IP Subnet / CIDR Calculator

Network, broadcast, host range and mask for any IPv4 CIDR. Free, no sign-up, and it runs in your browser — your files are never uploaded.

How to use

1. Enter an IP with a prefix, e.g. 192.168.1.10/24
2. Read the network, host range and mask

Questions

Do I need an account?

No. Every tool is free to use without signing up.

Is my data uploaded?

No. This tool runs in your browser, so the text and files you use stay on your device.

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