Who owns MAC prefix 00123A?

00123A is registered to Posystech Inc., Co. in the IEEE MA-L registry.

What devices use 00123A?

Any network device with a MAC address starting 00:12:3A was manufactured by or for Posystech Inc., Co..

MA-L · OUI prefix

Posystech Inc., Co.

Any MAC address starting 00:12:3A is registered to Posystech Inc., Co. in KR.

OUI prefix	00123A
Vendor	Posystech Inc., Co.
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	00:12:3A:00:00:00

What this means

The IEEE assigned the MA-L block 00123A to Posystech Inc., Co.. 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 00:12:3A, it is Posystech Inc., Co. hardware.

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