What this means
The IEEE assigned the MA-L block 541DFB to Freestyle Energy Ltd. 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 54:1D:FB, it is Freestyle Energy Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 541DFB?
541DFB is registered to Freestyle Energy Ltd 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. Freestyle Energy Ltd's block covers 16,777,216 addresses.
What devices use 541DFB?
Any network device with a MAC address starting 54:1D:FB was manufactured by or for Freestyle Energy Ltd.