Cidr Calculator
This cidr calculator expands a CIDR block into its address range, mask and host count. It runs entirely in your browser, so results are instant and nothing you enter is uploaded.
Your input is processed locally in your browser and is not uploaded or stored.
What this tool does
Interpreting classless inter-domain routing prefixes. This cidr calculator is free, works on desktop and mobile, and requires no sign-up.
Also useful for: 172.64.0.0/13 cidr range subnet calculator, aws cidr subnet calculator, aws vpc subnet cidr calculator, cidr and subnet calculator, cidr notation subnet calculator, cidr notation to subnet mask calculator, cidr to subnet calculator, cidr to subnet mask calculator.
Features
- Handles cidr calculator with instant, in-browser results
- No account, no upload and no usage limits
- Copy or download results in one click
How to use it
- Enter your input for the cidr calculator
- Read the result as it updates
- Copy or download what you need
Common uses
- Everyday cidr calculator work
- Quick checks while coding or writing
- Learning how the format behaves
Good to know
- For very large inputs, processing speed depends on your device
Related standards and concepts: RFC 4632.
Frequently asked questions
Is the cidr calculator free to use?
Yes. Every tool on the site is free, needs no account and has no usage limits.
Does it work offline?
Once the page has loaded it runs locally in your browser without further network calls.