Who owns MAC prefix 6891D04?

6891D04 is registered to G-TECH Instruments Inc. in the IEEE MA-M registry.

What devices use 6891D04?

Any network device with a MAC address starting 68:91:D0:4 was manufactured by or for G-TECH Instruments Inc..

MA-M · OUI prefix

G-TECH Instruments Inc.

Any MAC address starting 68:91:D0:4 is registered to G-TECH Instruments Inc. in TW.

OUI prefix	6891D04
Vendor	G-TECH Instruments Inc.
Registry	MA-M (28-bit, medium block)
Country	TW
Example MAC	68:91:D0:4:00:00:00

What this means

The IEEE assigned the MA-M block 6891D04 to G-TECH Instruments Inc.. 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 68:91:D0:4, it is G-TECH Instruments Inc. hardware.

Look up another MAC