What this means
The IEEE assigned the MA-L block EC9B2D to China Mobile Group Device 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 EC:9B:2D, it is China Mobile Group Device Co.,Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix EC9B2D?
EC9B2D is registered to China Mobile Group Device 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 Mobile Group Device Co.,Ltd.'s block covers 16,777,216 addresses.
What devices use EC9B2D?
Any network device with a MAC address starting EC:9B:2D was manufactured by or for China Mobile Group Device Co.,Ltd..