What this means
The IEEE assigned the MA-L block 0438DC to China Unicom Online Information 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 04:38:DC, it is China Unicom Online Information Technology Co.,Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 0438DC?
0438DC is registered to China Unicom Online Information 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. China Unicom Online Information Technology Co.,Ltd's block covers 16,777,216 addresses.
What devices use 0438DC?
Any network device with a MAC address starting 04:38:DC was manufactured by or for China Unicom Online Information Technology Co.,Ltd.