Subnet Calculator
A free online subnet calculator for network administrators, IT professionals, and students to quickly compute subnet details for IPv4 addresses.

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About This Tool
Our subnet calculator is a powerful, easy-to-use tool designed for network engineers, IT professionals, and students to perform rapid IPv4 subnetting. Simply input an IP address and subnet mask (CIDR or dotted decimal), and the tool instantly displays network address, broadcast address, range of usable IPs, and total hosts available.
This tool simplifies complex subnet calculations, reduces manual errors, and increases efficiency in designing and troubleshooting networks. Whether planning a new network, segmenting existing infrastructure, or studying networking concepts, this calculator provides accurate and comprehensive results with a user-friendly interface.
Additional features include support for custom network bits, subnet overview charts, and options to export results for documentation. It is an essential resource for network admins, cybersecurity experts, DevOps teams, and students learning subnetting concepts. The calculator performs validation on inputs, handles edge cases with friendly error messages, and adapts seamlessly to both desktop and mobile devices, ensuring accessibility and ease of use across environments.
How to Use
1. Enter the IP address you want to subnet.
2. Input the subnet mask as CIDR notation (/24) or dotted decimal (255.255.255.0).
3. Click the 'Calculate' button to see subnet details.
4. Review the results, copy data, or export as needed.
5. Use advanced options for custom network sizes or visual charts if required.

FAQs/Additional Resources
Find Quick Answers
What is a subnet calculator used for?
How do I input subnet masks?
Is this tool suitable for IPv6?
Can I export my results?
What if I input invalid IP addresses?
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