CIDR Calculator
Enter an IPv4 address and prefix length to calculate network details such as subnet mask, network address, broadcast address, and usable range.
Example: 192.168.1.10 / 24
| Metric | Value |
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Privacy: calculations run locally in your browser. No network data is stored or transmitted.
How it works
CIDR notation combines an IPv4 address with a prefix length such as /24. The prefix length determines how many leading bits belong to the network.
Examples
- 192.168.1.10 / 24 → network 192.168.1.0, broadcast 192.168.1.255
- 10.0.5.10 / 16 → network 10.0.0.0
- 172.16.8.1 / 20 → mask 255.255.240.0
When to use this tool
This tool is designed for quick, practical tasks such as everyday calculations, data formatting, or simple conversions. It is best used when you need fast results without installing software or using complex tools.
When to use
- Quick checks or one-time calculations
- Validating or converting data before using it elsewhere
- Simple tasks that do not require advanced software
When not to use
- Critical financial, legal, or medical decisions
- Large-scale or automated processing
- Situations requiring guaranteed precision beyond basic validation
Always review results before using them in important contexts.
About this tool
This tool helps you perform quick utility operations directly in your browser. It runs entirely in your browser without sending data to a server.
You can use this tool when handling simple tasks without installing additional software. The results should be interpreted as a processed output based on your input data.
FAQ
- What does this CIDR calculator do?
It calculates subnet mask, wildcard mask, network address, broadcast address, and usable host range from an IPv4 address and prefix length.
- What CIDR range is allowed?
This tool accepts IPv4 prefix lengths from /0 to /32.
- Does it show usable hosts?
Yes. It shows the first and last usable host when that concept applies.
- Is my input stored?
No. All calculations run locally in your browser.