What this means
The IEEE assigned the MA-L block 00039D to Qisda Corporation. 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 00:03:9D, it is Qisda Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 00039D?
00039D is registered to Qisda Corporation 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. Qisda Corporation's block covers 16,777,216 addresses.
What devices use 00039D?
Any network device with a MAC address starting 00:03:9D was manufactured by or for Qisda Corporation.