What this means
The IEEE assigned the MA-L block 78DDD9 to Guangzhou Shiyuan Electronics 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 78:DD:D9, it is Guangzhou Shiyuan Electronics Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 78DDD9?
78DDD9 is registered to Guangzhou Shiyuan Electronics 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. Guangzhou Shiyuan Electronics Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 78DDD9?
Any network device with a MAC address starting 78:DD:D9 was manufactured by or for Guangzhou Shiyuan Electronics Co., Ltd..