CIDR / Subnet Calculator

Runs in your browser — nothing is uploaded

CIDR notation

About this tool

IPv4 subnet math — enter an address in CIDR notation to get its network address, broadcast address, usable host range, and netmask. Pure calculation, done in your browser.

Frequently asked questions

What is CIDR / Subnet Calculator?

Subnet math — network/broadcast address, netmask, host range. It is one of the Network Tools tools on MyCodeTips.

How do I use CIDR / Subnet Calculator?

Open the tool, enter or paste your input, and the result appears right away. Use the Copy button to copy it.

Is CIDR / Subnet Calculator free to use?

Yes. It is free to use and does not need an account.

Is my data safe with CIDR / Subnet Calculator?

Yes. It runs entirely in your browser, so what you enter is never uploaded to our servers.

Can I share my result?

Yes. Use the share buttons below the tool to post a link or copy a link to the tool page.