IPv4 subnet calculator
Calculate an IPv4 network, subnet mask, last address and address count from CIDR notation.
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IPv4 subnet calculator — workspace
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How to use: IPv4 subnet calculator
Start with the example, or replace it with your own values.
Review Text or data, then select “Get result”.
Read the result, then copy or download it. Edit any input to try again.
What you can do
- Calculate an IPv4 network, subnet mask, last address and address count from CIDR notation.
What you get
- A result you can review, copy or download. Numeric tools show labeled calculations; text tools show the transformed output.
What you need
- Text or data
- Enter or paste your value, or start with the example.
Try an example
- Text or data
192.168.1.10/24
Good to know
- Use a current browser with JavaScript enabled. Available formats and speed depend on your browser, device and input size.
Your work stays on your device
Your files and entered values are processed in your browser and are not uploaded for processing. The website and any required processing engines still download from the site.
Questions & answers
Is IPv4 subnet calculator free?
Yes. IPv4 subnet calculator is free to use and does not require an account.
Are my files or entered values uploaded?
Your files and entered values are processed in your browser and are not uploaded for processing. The website and any required processing engines still download from the site.
What result can I save?
A result you can review, copy or download. Numeric tools show labeled calculations; text tools show the transformed output.
What should I check before using the result?
Use a current browser with JavaScript enabled. Available formats and speed depend on your browser, device and input size.