Who owns MAC prefix 3891FB?

3891FB is registered to Xenox Holding BV in the IEEE MA-L registry.

What devices use 3891FB?

Any network device with a MAC address starting 38:91:FB was manufactured by or for Xenox Holding BV.

MA-L · OUI prefix

Xenox Holding BV

Any MAC address starting 38:91:FB is registered to Xenox Holding BV in HC.

OUI prefix	3891FB
Vendor	Xenox Holding BV
Registry	MA-L (24-bit, large block)
Country	HC
Example MAC	38:91:FB:00:00:00

What this means

The IEEE assigned the MA-L block 3891FB to Xenox Holding BV. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 38:91:FB, it is Xenox Holding BV hardware.

Look up another MAC