What this means
The IEEE assigned the MA-L block 0011B4 to Westermo Network Technologies AB. 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 00:11:B4, it is Westermo Network Technologies AB hardware.
Frequently Asked Questions
Who owns MAC prefix 0011B4?
0011B4 is registered to Westermo Network Technologies AB 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. Westermo Network Technologies AB's block covers 16,777,216 addresses.
What devices use 0011B4?
Any network device with a MAC address starting 00:11:B4 was manufactured by or for Westermo Network Technologies AB.