Online IP Subnet Calculator

IP Subnet Calculator – Simplify Network Planning in Seconds

Understanding IP subnetting doesn’t have to be complicated. With the IP Subnet Calculator by bckinfo, you can instantly calculate subnet details and plan your network with confidence—no manual math, no guesswork.

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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