Who owns MAC prefix 009000?

009000 is registered to DIAMOND MULTIMEDIA in the IEEE MA-L registry.

What devices use 009000?

Any network device with a MAC address starting 00:90:00 was manufactured by or for DIAMOND MULTIMEDIA.

MA-L · OUI prefix

DIAMOND MULTIMEDIA

Any MAC address starting 00:90:00 is registered to DIAMOND MULTIMEDIA in US.

OUI prefix	009000
Vendor	DIAMOND MULTIMEDIA
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:90:00:00:00:00

What this means

The IEEE assigned the MA-L block 009000 to DIAMOND MULTIMEDIA. 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 00:90:00, it is DIAMOND MULTIMEDIA hardware.

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