Who owns MAC prefix 004030?

004030 is registered to GK COMPUTER in the IEEE MA-L registry.

What devices use 004030?

Any network device with a MAC address starting 00:40:30 was manufactured by or for GK COMPUTER.

MA-L · OUI prefix

GK COMPUTER

Any MAC address starting 00:40:30 is registered to GK COMPUTER in DE.

OUI prefix	004030
Vendor	GK COMPUTER
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	00:40:30:00:00:00

What this means

The IEEE assigned the MA-L block 004030 to GK COMPUTER. 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 00:40:30, it is GK COMPUTER hardware.

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