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.
Frequently Asked Questions
Who owns MAC prefix 6891D04?
6891D04 is registered to G-TECH Instruments Inc. in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. G-TECH Instruments Inc.'s block covers 1,048,576 addresses.
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..