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Subnet / CIDR Calculator

Calculate network, broadcast, and usable host range for IPv4 CIDR blocks.

CIDR192.168.1.0/24
Network192.168.1.0
Broadcast192.168.1.255
Subnet Mask255.255.255.0
Wildcard Mask0.0.0.255
First Usable Host192.168.1.1
Last Usable Host192.168.1.254
Total Addresses256
Usable Hosts254
  • 100% free — no account needed
  • Runs in your browser
  • Nothing is uploaded

Frequently asked questions

Is Subnet / CIDR Calculator really free?

Yes. Subnet / CIDR Calculator is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.

Does Subnet / CIDR Calculator upload my data?

No. Subnet / CIDR Calculator runs entirely inside your browser, so anything you type, paste, or open stays on your own device.

Do I need to sign up or install anything?

Neither. There is no account and nothing to download — open the page and Subnet / CIDR Calculator is ready to use on desktop or mobile.

Does Subnet / CIDR Calculator work offline?

Once the page has loaded, yes. All of the processing happens locally in your browser, so it keeps working without a connection.

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