Online IP Subnet Calculator
Manually calculating subnet information can be confusing, especially for beginners. Calculate network address, subnet mask, wildcard mask, and host range for IPv4 and IPv6.
Enter required information below
An IP Subnet Calculator automates all the required computations instantly. This saves time and prevents human error—especially helpful for IT admins, network engineers, and students learning networking.
Note: This calculator supports both IPv4 and IPv6 addresses. For IPv4, you can use either CIDR notation (0-32) or subnet mask. For IPv6, use prefix length (0-128).
Class A, B, and C provide the foundation for understanding how IP addressing works. Even though classful networks are no longer used in modern routing, these concepts remain essential for mastering subnetting, calculating hosts, and managing IP allocation in real-world networking environments.
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