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CIDR Range Calculator

Calculate network address, broadcast, subnet mask, first/last host, and total hosts from any CIDR notation. Free online IP CIDR range calculator for network engineers.

What is CIDR Range Calculator?

CIDR Range Calculator is a free online developer utility. Calculate network address, broadcast, subnet mask, first/last host, and total hosts from any CIDR notation. Free online IP CIDR range calculator for network engineers. It runs entirely client-side using modern browser APIs — no server, no API key, no sign-up required.

How to use CIDR Range Calculator

Getting started is instant:

  • ✓Paste your input (code, string, or data) into the input field.
  • ✓The output is generated immediately in your browser.
  • ✓Copy the result with the one-click copy button.
  • ✓Use it directly in your project, API, or debug workflow.

Why use CIDR Range Calculator?

CIDR Range Calculator saves developer time by eliminating the need to write one-off scripts or search for library documentation. All processing is local — your sensitive data never reaches a server. It is also completely free with no rate limits.

Frequently Asked Questions

How do I use CIDR Range Calculator?
Calculate network address, broadcast, subnet mask, first/last host, and total hosts from any CIDR notation. Free online IP CIDR range calculator for network engineers. Paste your input, and the output is generated instantly in your browser.
Is CIDR Range Calculator free?
Yes, CIDR Range Calculator is 100% free with no rate limits or API keys required.
Is CIDR Range Calculator secure?
All processing happens locally in your browser — your data is never sent to any server.
Can I use CIDR Range Calculator in production?
CIDR Range Calculator is great for development, debugging and quick conversions. For production pipelines, integrate the same logic server-side.
Does CIDR Range Calculator work offline?
Yes — CIDR Range Calculator is a fully client-side tool that works without an internet connection once loaded.

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