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Ubify Core Engineering Team
SOFTWARE ENGINEERS & SYSTEMS ARCHITECTS
About This Tool
IP Subnet & CIDR Prefix Calculator is an interactive online calculator on tools.ubify.app. Calculate IPv4 network address, usable host ranges, broadcast IP, and wildcard masks from CIDR notation.
Fast, 100% free, private client-side processing directly in your browser with zero server data storage.
How to Use
- 1
Enter your parameter values into the input fields.
- 2
Adjust optional settings or unit parameters.
- 3
View real-time calculated metrics and breakdown statistics.
- 4
Copy the results summary or print your report for documentation.
Frequently Asked Questions
Why do you subtract 2 addresses in a subnet?
The first address in any subnet represents the network wire ID itself, and the last address is the broadcast address used to send packets to all hosts.