Calculate subnet masks, CIDR notation, network and broadcast addresses, and usable IP ranges instantly.
Network Address
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Broadcast Address
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Subnet Mask
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Wildcard Mask
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Total Hosts
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Usable Hosts
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IP Range
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IP Class
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Is Private
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Quick Guide
Step 1: Enter an IP address (e.g., 192.168.1.0)
Step 2: Select the desired CIDR prefix (/8 to /30)
Step 3: Click Calculate to see subnet details
What is Subnet Calculator?
Subnet Calculator computes subnet masks, ranges, and CIDR notation. See also: ip-geolocation or dns-lookup.
How It Works
Enter the required information, configure your preferences, and click the process button. The tool performs the security analysis or generation using client-side algorithms and displays the results instantly. No data is transmitted externally.
Use Cases
System administrators checking security configurations quickly
Developers validating security tokens, hashes, or headers
Security-conscious users generating strong passwords or encryption keys
Frequently Asked Questions
Is the Subnet Calculator safe to use?
Yes, all processing happens locally in your browser. No sensitive data is transmitted.
Can I use it for production security checks?
The tool is suitable for quick checks but should complement, not replace, dedicated security tools.
Is the tool free?
Yes, it is completely free with no restrictions on usage.