Who owns MAC prefix 00903B?

00903B is registered to TriEMS Research Lab, Inc. in the IEEE MA-L registry.

What devices use 00903B?

Any network device with a MAC address starting 00:90:3B was manufactured by or for TriEMS Research Lab, Inc..

MA-L · OUI prefix

TriEMS Research Lab, Inc.

Any MAC address starting 00:90:3B is registered to TriEMS Research Lab, Inc. in US.

OUI prefix	00903B
Vendor	TriEMS Research Lab, Inc.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:90:3B:00:00:00

What this means

The IEEE assigned the MA-L block 00903B to TriEMS Research Lab, Inc.. 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 00:90:3B, it is TriEMS Research Lab, Inc. hardware.

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