What this means
The IEEE assigned the MA-L block 000D8B to T&D 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 00:0D:8B, it is T&D Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 000D8B?
000D8B is registered to T&D 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. T&D Corporation's block covers 16,777,216 addresses.
What devices use 000D8B?
Any network device with a MAC address starting 00:0D:8B was manufactured by or for T&D Corporation.