Developer ToolsSubnet Calculator
Subnet Calculator
Calculate subnet details for both IPv4 and IPv6 networks
Tools
Subnet Calculator
Subnet Information
Enter a CIDR notation (e.g., 192.168.1.0/24) and click Calculate to see subnet information
About Subnet Calculation
What is a Subnet Calculator?
A subnet calculator is a network tool that helps network administrators and IT professionals calculate various aspects of subnetting and IP addressing. It converts CIDR notation (Classless Inter-Domain Routing) into subnet mask, network address, broadcast address, and range of usable IP addresses.
How to Use This Subnet Calculator
- Enter an IP address with CIDR notation (e.g., 192.168.1.0/24 or 2001:db8::/64)
- Click the "Calculate" button
- View the detailed subnet information including network address, broadcast address, usable IP range, and more
Common IPv4 Subnet Masks
| CIDR | Subnet Mask | Total IPs |
|---|---|---|
| /24 | 255.255.255.0 | 256 |
| /25 | 255.255.255.128 | 128 |
| /26 | 255.255.255.192 | 64 |
| /27 | 255.255.255.224 | 32 |
| /28 | 255.255.255.240 | 16 |
| /29 | 255.255.255.248 | 8 |
| /30 | 255.255.255.252 | 4 |
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