All Tools VerseIP Subnet Calculator
Calculate the details of an IPv4 subnet from CIDR notation, including netmask, broadcast, and host range.
- Runs in your browser
- Nothing uploaded
- Free, no sign-up
Calculated locally in your browser. Nothing is uploaded.
How to Use IP Subnet Calculator
- Enter a CIDR address. For example, 192.168.1.0/24.
- Calculate. The address and prefix are analysed.
- Read the result. Network, netmask, broadcast, and host range are listed.
- Copy the result. Click Copy result. It all runs in your browser.
Frequently Asked Questions
What does it calculate?
From a CIDR address it works out the network address, netmask, wildcard mask, broadcast address, and the usable host range.
What format should I use?
Standard CIDR notation, an IPv4 address followed by a slash and a prefix length, such as 10.0.0.0/8.
Does it handle small subnets?
Yes. The /31 and /32 cases are handled with the correct host counts.
Is my data sent anywhere?
No. The calculation runs entirely in your browser, so nothing leaves the tab.
Is it free?
Yes. Every tool here is free to use with no sign up.
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