Privacy IPv4 Subnet Calculator
Enter IPv4 Address
/
or
CIDR Reference
| CIDR | Mask | Hosts |
|---|---|---|
| /8 | 255.0.0.0 | 16,777,214 |
| /16 | 255.255.0.0 | 65,534 |
| /24 | 255.255.255.0 | 254 |
| /25 | 255.255.255.128 | 126 |
| /26 | 255.255.255.192 | 62 |
| /27 | 255.255.255.224 | 30 |
| /28 | 255.255.255.240 | 14 |
| /29 | 255.255.255.248 | 6 |
| /30 | 255.255.255.252 | 2 |
Results
Enter an IP address and click Calculate
About IPv4 Subnet Calculator
This calculator helps you determine subnet information for IPv4 networks. Enter an IP address with CIDR notation (e.g., 192.168.1.0/24) or subnet mask to calculate network address, broadcast address, usable host range, and more. All calculations are performed in your browser.
IPv4 Subnetting Explained:
- Network Address: The first address in a subnet, identifies the network itself. All host bits are set to 0.
- Broadcast Address: The last address in a subnet, used to send data to all hosts. All host bits are set to 1.
- CIDR Notation: Classless Inter-Domain Routing uses /prefix to indicate network bits (e.g., /24 = 255.255.255.0).
- Usable Hosts: Total addresses minus 2 (network and broadcast). A /24 network has 254 usable hosts.
🔒 Privacy-Friendly: All calculations are performed entirely in your browser. No IP addresses or network data is sent to any server.
⚠️ Disclaimer: This calculator is for educational and planning purposes. Always verify network configurations before implementation.
This tool answers questions like:
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