What this means
The IEEE assigned the MA-L block D01242 to BIOS Corporation. 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 D0:12:42, it is BIOS Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix D01242?
D01242 is registered to BIOS Corporation 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. BIOS Corporation's block covers 16,777,216 addresses.
What devices use D01242?
Any network device with a MAC address starting D0:12:42 was manufactured by or for BIOS Corporation.