What this means
The IEEE assigned the MA-M block 38B14E5 to Brookhaven National Laboratory. 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 38:B1:4E:5, it is Brookhaven National Laboratory hardware.
Frequently Asked Questions
Who owns MAC prefix 38B14E5?
38B14E5 is registered to Brookhaven National Laboratory in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Brookhaven National Laboratory's block covers 1,048,576 addresses.
What devices use 38B14E5?
Any network device with a MAC address starting 38:B1:4E:5 was manufactured by or for Brookhaven National Laboratory.