Wireless Network Watcher: See What's Connected to Your Wi-Fi

What it does

Wireless Network Watcher pings the address range of your local network and reports which devices respond, showing IP address, MAC address, network adapter manufacturer (from the MAC prefix), and computer name when the device provides one.

It's a quick way to answer 'what's currently on my Wi-Fi' without logging into your router's admin page.

How to use it

1. 1Download it from the official NirSoft page at nirsoft.net.
2. 2Extract the zip file — no installation required.
3. 3Run WNetWatcher.exe; it auto-detects your active network adapter and scans the subnet.
4. 4Review the device list; unrecognized entries can be cross-checked against your router's own connected-devices page.

Limitations

• It only sees devices that respond to network probes while the scan runs — it's a snapshot, not continuous monitoring.
• Device names are only shown if the device broadcasts one; many phones and IoT devices show up only as an IP/MAC pair.
• It can't tell you whether an unrecognized device is a neighbor's guest or someone on your network without authorization — for that, cross-reference with your router's admin page and consider changing your Wi-Fi password if anything looks wrong.

Built-in Windows alternatives

Windows doesn't ship a direct equivalent, but you can get a partial picture with built-in tools: `arp -a` in Command Prompt lists recently-contacted devices on the local subnet, and your router's web admin page (usually at 192.168.0.1 or 192.168.1.1) shows connected clients directly from the source of truth.

See also: broader network troubleshooting

For general Windows network diagnostics beyond device discovery — checking your own IP configuration, testing connectivity, and tracing routes — see our built-in tools guide.