Who owns MAC prefix 004004?

004004 is registered to ICM CO. LTD. in the IEEE MA-L registry.

What devices use 004004?

Any network device with a MAC address starting 00:40:04 was manufactured by or for ICM CO. LTD..

MA-L · OUI prefix

ICM CO. LTD.

Any MAC address starting 00:40:04 is registered to ICM CO. LTD. in KU.

OUI prefix	004004
Vendor	ICM CO. LTD.
Registry	MA-L (24-bit, large block)
Country	KU
Example MAC	00:40:04:00:00:00

What this means

The IEEE assigned the MA-L block 004004 to ICM CO. LTD.. 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 00:40:04, it is ICM CO. LTD. hardware.

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