Who owns MAC prefix 78392D5?

78392D5 is registered to IO Master Technology in the IEEE MA-M registry.

What devices use 78392D5?

Any network device with a MAC address starting 78:39:2D:5 was manufactured by or for IO Master Technology.

MA-M · OUI prefix

IO Master Technology

Any MAC address starting 78:39:2D:5 is registered to IO Master Technology in TW.

OUI prefix	78392D5
Vendor	IO Master Technology
Registry	MA-M (28-bit, medium block)
Country	TW
Example MAC	78:39:2D:5:00:00:00

What this means

The IEEE assigned the MA-M block 78392D5 to IO Master Technology. 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 78:39:2D:5, it is IO Master Technology hardware.

Other IO Master Technology prefixes

IO Master Technology holds 2 registered blocks in total.

8C1F64BD3

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