Who owns MAC prefix 00044B?

00044B is registered to NVIDIA in the IEEE MA-L registry.

What devices use 00044B?

Any network device with a MAC address starting 00:04:4B was manufactured by or for NVIDIA.

MA-L · OUI prefix

NVIDIA

Any MAC address starting 00:04:4B is registered to NVIDIA in US.

OUI prefix	00044B
Vendor	NVIDIA
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:04:4B:00:00:00

What this means

The IEEE assigned the MA-L block 00044B to NVIDIA. 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 00:04:4B, it is NVIDIA hardware.

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