The 0FE6:9900 isn't cutting-edge tech. It’s a reliable, aging workhorse that just works—provided you can find the right driver. If you see this ID in your lsusb output, you know exactly what you're dealing with: a simple, no-frills bridge to the wired world.
Have you used this adapter for a project? Did you run into driver issues on Windows? Let me know below.
Here’s a technical write-up for the USB device with VID 0x0FE6 and PID 0x9900. usb vid-0fe6 amp-pid-9900
In rarer scenarios, this VID/PID combination appears in:
However, for 99% of modern support queries, you are dealing with a USB Ethernet dongle. The 0FE6:9900 isn't cutting-edge tech
The VID 0FE6 belongs to Kontron, but in the wild, this ID is often used by generic manufacturers producing clone chips. The device PID 9900 identifies it as a USB 2.0 Fast Ethernet adapter.
Because these are often mass-produced "clones," the drivers are rarely signed by a major vendor. If you plug this into a modern Windows 10 or Windows 11 machine, it often fails to install automatically. You are usually forced to hunt down the dm9601.sys driver or use a driver pack utility. In rarer scenarios, this VID/PID combination appears in:
You notice your router assigns a new IP or the MAC address in ipconfig /all changes.
Apple does not include a native driver for this chip. Third-party options exist but are increasingly unreliable on modern macOS versions (Ventura, Sonoma, Sequoia).
Because this VID/PID is widely cloned, the device may not be what it claims. Avoid using untrusted USB Ethernet adapters with this identifier in secure environments unless you have validated the chipset via physical inspection or advanced USB descriptors.