Runeforge

IPv4 Subnet / CIDR Calculator

Network, broadcast, mask, wildcard and host range for any CIDR.

Runs in your browser: data never leaves your device. Free, no sign-up. Also known as: cidr, subnet mask, netmask, ip range.

How to use IPv4 Subnet / CIDR Calculator

  1. Paste your input, open a file, or press Sample to see an example.
  2. Pick a mode or adjust the options; results update instantly.
  3. Use Copy or Download to take the result with you.

Frequently asked questions

What does the IPv4 Subnet / CIDR Calculator do?
Network, broadcast, mask, wildcard and host range for any CIDR.
Is the IPv4 Subnet / CIDR Calculator free?
Yes. It is completely free, with no sign-up, no watermark and no usage limits.
Is my data safe?
Yes. This tool runs entirely in your web browser. Your text and files are never uploaded to a server, stored or logged.
Does it work on mobile?
Yes. It works in any modern browser on Windows, macOS, Linux, Android and iOS, with nothing to install.
What other networking tools are there?
Runeforge has 5 networking tools in Ley Lines, plus 100 more tools across other categories.

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