What this means
The IEEE assigned the MA-L block D83EEF to COOSEA GROUP (HK) COMPANY LIMITED. 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 D8:3E:EF, it is COOSEA GROUP (HK) COMPANY LIMITED hardware.
Frequently Asked Questions
Who owns MAC prefix D83EEF?
D83EEF is registered to COOSEA GROUP (HK) COMPANY LIMITED 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. COOSEA GROUP (HK) COMPANY LIMITED's block covers 16,777,216 addresses.
What devices use D83EEF?
Any network device with a MAC address starting D8:3E:EF was manufactured by or for COOSEA GROUP (HK) COMPANY LIMITED.