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.
Frequently Asked Questions
Who owns MAC prefix 00903B?
00903B is registered to TriEMS Research Lab, Inc. in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. TriEMS Research Lab, Inc.'s block covers 16,777,216 addresses.
What devices use 00903B?
Any network device with a MAC address starting 00:90:3B was manufactured by or for TriEMS Research Lab, Inc..