What this means
The IEEE assigned the MA-L block D0CEC9 to HAN CHANG. 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 D0:CE:C9, it is HAN CHANG hardware.
Frequently Asked Questions
Who owns MAC prefix D0CEC9?
D0CEC9 is registered to HAN CHANG 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. HAN CHANG's block covers 16,777,216 addresses.
What devices use D0CEC9?
Any network device with a MAC address starting D0:CE:C9 was manufactured by or for HAN CHANG.