Subnet Calculator
Calculate IP subnet ranges, broadcast addresses, and host counts. Free online tool.
All processing happens in your browser. Your data never leaves your device.
How to Use
- 1Enter an IP address (e.g., 192.168.1.0).
- 2Select the CIDR prefix length (e.g., /24).
- 3View the subnet details including network range, broadcast, and host count.
What is Subnet Calculator?
Subnet Calculator calculates IPv4 subnet details from an IP address and CIDR prefix. It shows the network address, broadcast address, subnet mask, usable host range, and more.
Key Features
- Calculate subnet ranges
- Show subnet mask and wildcard
- Display usable host range
- Binary representation view
- IP class and type detection
- 100% client-side
- RFC compliant
- CIDR notation
Subnet Calculator vs Other Tools
| Feature | Subnet Calculator | Other Tools |
|---|---|---|
| Client-side processing | Yes | Varies |
| No signup required | Yes | Often required |
| Privacy-first (no data sent) | Yes | Rarely |
| Free & unlimited | Yes | Often limited |
| No ads interruption | Yes | Often no |
FAQ
What is IP subnet calculation?
IP subnet calculation helps network administrators determine network ranges, broadcast addresses, and usable host addresses within an IP network defined by CIDR notation.
How is IP data processed?
All IP calculations use mathematical operations on 32-bit integers representing IPv4 addresses. No network requests are made - everything runs locally in your browser.
Can I calculate IPv6 subnets?
Currently, the tools focus on IPv4 subnet calculations. IPv6 support may be added in future updates.