Who owns MAC prefix A8B9B3?

A8B9B3 is registered to ESSYS in the IEEE MA-L registry.

What devices use A8B9B3?

Any network device with a MAC address starting A8:B9:B3 was manufactured by or for ESSYS.

MA-L · OUI prefix

ESSYS

Any MAC address starting A8:B9:B3 is registered to ESSYS in KR.

OUI prefix	A8B9B3
Vendor	ESSYS
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	A8:B9:B3:00:00:00

What this means

The IEEE assigned the MA-L block A8B9B3 to ESSYS. 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 A8:B9:B3, it is ESSYS hardware.

Other ESSYS prefixes

ESSYS holds 5 registered blocks in total.

28CF08 487AFF C0CAA2 ECAB3E

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