Subnet calculator (CIDR)
Compute the mask, network address, broadcast and host range of an IPv4 block.
How to use it
- Add your file or enter your values.
- Adjust the options if needed.
- Run it: the result appears at once and stays on your device.
FAQ
What is Subnet calculator (CIDR) for?
Compute the mask, network address, broadcast and host range of an IPv4 block.
How do I use Subnet calculator (CIDR)?
1. Add your file or enter your values. 2. Adjust the options if needed. 3. Run it: the result appears at once and stays on your device.
Is my data sent anywhere?
No, the calculation runs entirely in your browser.
Is Subnet calculator (CIDR) free and unlimited?
Yes, no signup, no usage limit.
Which browsers are supported?
All modern browsers, on desktop and mobile.
Does Subnet calculator (CIDR) work offline?
After a first visit, most tools keep working without a connection.