What this means
The IEEE assigned the MA-L block D4D7A9 to Shanghai Kaixiang Info Tech 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:D7:A9, it is Shanghai Kaixiang Info Tech LTD hardware.
Frequently Asked Questions
Who owns MAC prefix D4D7A9?
D4D7A9 is registered to Shanghai Kaixiang Info Tech 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 Kaixiang Info Tech LTD's block covers 16,777,216 addresses.
What devices use D4D7A9?
Any network device with a MAC address starting D4:D7:A9 was manufactured by or for Shanghai Kaixiang Info Tech LTD.