What this means
The IEEE assigned the MA-L block 7891DE to Guangdong ACIGA Science&Technology 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 78:91:DE, it is Guangdong ACIGA Science&Technology Co.,Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 7891DE?
7891DE is registered to Guangdong ACIGA Science&Technology 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. Guangdong ACIGA Science&Technology Co.,Ltd's block covers 16,777,216 addresses.
What devices use 7891DE?
Any network device with a MAC address starting 78:91:DE was manufactured by or for Guangdong ACIGA Science&Technology Co.,Ltd.