Who owns MAC prefix 003081?

003081 is registered to ALTOS C&C in the IEEE MA-L registry.

What devices use 003081?

Any network device with a MAC address starting 00:30:81 was manufactured by or for ALTOS C&C.

MA-L · OUI prefix

ALTOS C&C

Any MAC address starting 00:30:81 is registered to ALTOS C&C in KR.

OUI prefix	003081
Vendor	ALTOS C&C
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	00:30:81:00:00:00

What this means

The IEEE assigned the MA-L block 003081 to ALTOS C&C. 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 00:30:81, it is ALTOS C&C hardware.

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