What this means
The IEEE assigned the MA-L block B81F5E to Apption Labs Limited. 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 B8:1F:5E, it is Apption Labs Limited hardware.
Frequently Asked Questions
Who owns MAC prefix B81F5E?
B81F5E is registered to Apption Labs Limited 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. Apption Labs Limited's block covers 16,777,216 addresses.
What devices use B81F5E?
Any network device with a MAC address starting B8:1F:5E was manufactured by or for Apption Labs Limited.