IP Subnet Calculator
Calculate IPv4 network, mask, broadcast, and address counts from CIDR.
Last updated: 2026-10-25
Free Online IP Subnet Calculator
Use this free online ip subnet calculator tool directly in your browser without installing software. Fast, mobile friendly and easy to use.
IP Subnet Calculator
Runs in your browser. Input is not sent to this site.
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About This Tool
About IP Subnet Calculator
Calculate IPv4 network, mask, broadcast, and address counts from CIDR. Most processing takes place locally in your browser.
How to use it
- Enter the requested text or values.
- Choose the processing or calculation action.
- Review and copy the generated result.
Frequently Asked Questions
Does this tool upload my input?
No. This page processes your data locally in the browser.
Is the result saved?
No. Copy or download any result you want to keep.
Can I use it on mobile?
Yes, on modern mobile browsers.
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