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What is Subnet Calculator?
Calculate subnet information including network address, broadcast address, host range, number of usable hosts, and wildcard mask. Essential for network planning and IP address management.
Key Features
How to Use Subnet Calculator
Enter an IP address and subnet mask or CIDR
Click Submit to calculate
View all subnet information
Plan your network accordingly
Common Use Cases
Tips & Best Practices
A /24 subnet gives you 254 usable hosts
Use /30 for point-to-point links (2 usable hosts)
Remember: network address and broadcast address are not usable for hosts
Frequently Asked Questions
What is subnetting?
Subnetting divides a network into smaller sub-networks, each with its own range of IP addresses. It improves security, performance, and IP address management.
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Subnet Calculator is part of our Network tools collection at AllInAOne. Use our free online tools for all your network needs — no registration required.