The script on this page will attempt to find your local ip addresses, using HTML5 WebRTC, and then use that info to probe for other live hosts on your lan(s).
As provided it should work with Chrome and Firefox on Windows and OS X. Chromium on Linux does not work, Firefox reportedly does.
See this post [https://hacking.ventures/local-ip-discovery-with-html5-webrtc-security-and-privacy-risk/] for a discussion on potential security and privacy consequences. Clues: Fingerprinting, Router / Printer exploitation.
Note that reloading the page with F5 or similar tends to cause a lot of false positives. Reset the url instead.
Your local ips appear to be:
Other boxes on your LAN possibly include (this will take some time ..):