What this means
The IEEE assigned the MA-L block 309E1D to OHSUNG. 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 30:9E:1D, it is OHSUNG hardware.
Frequently Asked Questions
Who owns MAC prefix 309E1D?
309E1D is registered to OHSUNG 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. OHSUNG's block covers 16,777,216 addresses.
What devices use 309E1D?
Any network device with a MAC address starting 30:9E:1D was manufactured by or for OHSUNG.