What this means
The IEEE assigned the MA-L block D43844 to UNION MAN 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 D4:38:44, it is UNION MAN TECHNOLOGY CO.,LTD hardware.
Frequently Asked Questions
Who owns MAC prefix D43844?
D43844 is registered to UNION MAN 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. UNION MAN TECHNOLOGY CO.,LTD's block covers 16,777,216 addresses.
What devices use D43844?
Any network device with a MAC address starting D4:38:44 was manufactured by or for UNION MAN TECHNOLOGY CO.,LTD.