Who owns MAC prefix B44D433?

B44D433 is registered to ETSME Technologies C0., Ltd. in the IEEE MA-M registry.

What devices use B44D433?

Any network device with a MAC address starting B4:4D:43:3 was manufactured by or for ETSME Technologies C0., Ltd..

MA-M · OUI prefix

ETSME Technologies C0., Ltd.

Any MAC address starting B4:4D:43:3 is registered to ETSME Technologies C0., Ltd. in CN.

OUI prefix	B44D433
Vendor	ETSME Technologies C0., Ltd.
Registry	MA-M (28-bit, medium block)
Country	CN
Example MAC	B4:4D:43:3:00:00:00

What this means

The IEEE assigned the MA-M block B44D433 to ETSME Technologies C0., 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 B4:4D:43:3, it is ETSME Technologies C0., Ltd. hardware.

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