Subnet Ninja – Terminal-style IPv4 subnet calculator with cloud integration

Summary: Subnet Ninja is a Windows terminal-style tool for IPv4 subnet calculations, offering fast on-premise subnet math for free and advanced features like AWS, Azure, and GCP reserved IP awareness, CIDR split trees, and overlap checks in its Pro version.

What it does

It performs IPv4 subnet calculations and supports cloud provider reserved IP modes, CIDR splitting, and overlap detection to streamline CIDR block planning.

Who it's for

Infrastructure engineers and network planners managing CIDR blocks on Windows systems.

Why it matters

It reduces the need to switch between multiple tools and spreadsheets when planning and validating subnet allocations.