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danieljh

CIDR / Subnet Calculator

Break a CIDR into its network, broadcast, range, masks, and a coloured binary view.

Input

Quick fill

Tap a preset to fill the field. RFC 1918 blocks plus a tiny /30 for quick sanity checks.

Output

Enter a CIDR on the left to see the breakdown.

Disclaimer. Provided as-is, with no warranty of any kind. Always verify critical results before acting on them — I accept no liability for inaccuracies, bugs, or any loss or damages arising from use of these tools.

Spotted a bug or want to suggest an improvement?Let me know