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Subnet Ninja

Subnet Ninja

Free IPv4. Pro: AWS/Azure/GCP + CIDR split + overlap.

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Subnet Ninja is a terminal-style subnet calculator for Windows. Free: fast on‑prem IPv4 subnet math. Pro: AWS/Azure/GCP reserved‑IP aware modes, a CIDR split tree, and CIDR overlap checks.
Subnet Ninja gallery image
Subnet Ninja gallery image
Subnet Ninja gallery image
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Launch tags:Productivity•Software Engineering•Developer Tools
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What do you think? …

Shota | engawa-dev
Maker
📌
Hi Product Hunt! I’m Shota, an infrastructure engineer from Japan. Subnet Ninja is my first Windows app. I built it to stop bouncing between Excel and multiple subnet calculators while planning CIDR blocks. Free: fast on‑prem IPv4 subnet math. Pro: AWS/Azure/GCP reserved‑IP aware modes, a CIDR split tree, and CIDR overlap checks. I’d love your feedback: what should I build next—IPv6 support or better export (CSV/JSON)? If you pick “export”, what format do you use most?