What this means
The IEEE assigned the MA-L block D4B680 to Shanghai Linkyum Microeletronics Co.,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 D4:B6:80, it is Shanghai Linkyum Microeletronics Co.,Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix D4B680?
D4B680 is registered to Shanghai Linkyum Microeletronics Co.,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. Shanghai Linkyum Microeletronics Co.,Ltd's block covers 16,777,216 addresses.
What devices use D4B680?
Any network device with a MAC address starting D4:B6:80 was manufactured by or for Shanghai Linkyum Microeletronics Co.,Ltd.