It’s less of an issue at home or office Wi-Fi network, but when you’re traveling, bound to an airport’s Wi-Fi or a coffee shop Wi-Fi network, your curiosity itch can be scratched with the LAN Scan network scanner app for your Mac.
This isn’t just a repeat of what you see when you open the Mac’s Airport utility in the Menubar. LAN Scan connects to each IP address on the local network, and does a NetBios scan, a Bonjour scan, and a Port scan. That gives you a quick and dirty picture about each user and device on a local network.
Picture? For whatever reason LAN Scan’s listings are vertical instead of horizontal but the information displayed is useful for snooping around on a network, troubleshooting a network, or merely scratching the curiosity itch.
LANScan has a few other useful functions, too, including a reverse DNS lookup, dictionary lookups for MAC addresses, Port addresses, and most Bonjour services.
Scans can be saved and reloaded to view later. It doesn’t take much effort to figure out what each device is that’s connected to the local Wi-Fi network, either, thanks to matching graphic icons. If the nominal price tag is a bit too much there’s always the free iStumbler which performs similar tricks.