IP / CIDR Calculator
Workspace
This workspace processes the content directly in your browser.
Formatting, decoding, validation, and common file work stay local whenever possible, then continue in the same result area for copy, download, or the next step.
Paste content, choose a file, or load a sample first.
The content stays in the local browser by default.
After processing, copy, download, or continue into a related workflow.
Input
Enter a single IPv4 address with CIDR prefix, for example 10.0.12.7/20.
Result
Examples: 192.168.1.10/24, 10.0.0.5/8, 172.16.8.9/20.
Calculate network address, mask, broadcast, host range and binary representation for IPv4 CIDR blocks.
Common tasks
- Subnet planning
- Firewall and route checks
- Quick IPv4 range verification
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