What this means
The IEEE assigned the MA-L block B41DEF to Internet Laboratories, Inc.. 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 B4:1D:EF, it is Internet Laboratories, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix B41DEF?
B41DEF is registered to Internet Laboratories, Inc. 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. Internet Laboratories, Inc.'s block covers 16,777,216 addresses.
What devices use B41DEF?
Any network device with a MAC address starting B4:1D:EF was manufactured by or for Internet Laboratories, Inc..