About Subnetlens
Subnetlens is a local-first Windows application for discovering devices on a local network, mapping network topology, and troubleshooting IT issues. It classifies devices, builds an interactive map of their connections, and tracks open ports and service history per device. It listens for mDNS and SSDP activity to detect device announcements in real time. The application includes tools such as ping, traceroute, DNS lookup, port scanning, WHOIS, GeoIP, TLS checks, and HTTP-header inspection. It is designed to help administrators, small businesses, managed service providers, and home-lab users understand their networks without deploying a cloud service or server stack. The supplied information does not establish the accuracy of device identification or vulnerability detection. Its role is local network discovery and troubleshooting.
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