What this means
The IEEE assigned the MA-L block 0001BB to Frequentis. 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 00:01:BB, it is Frequentis hardware.
Frequently Asked Questions
Who owns MAC prefix 0001BB?
0001BB is registered to Frequentis 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. Frequentis's block covers 16,777,216 addresses.
What devices use 0001BB?
Any network device with a MAC address starting 00:01:BB was manufactured by or for Frequentis.