What this means
The IEEE assigned the MA-L block 303F5D to PT HAN SUNG ELECTORONICS INDONESIA. 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 30:3F:5D, it is PT HAN SUNG ELECTORONICS INDONESIA hardware.
Frequently Asked Questions
Who owns MAC prefix 303F5D?
303F5D is registered to PT HAN SUNG ELECTORONICS INDONESIA 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. PT HAN SUNG ELECTORONICS INDONESIA's block covers 16,777,216 addresses.
What devices use 303F5D?
Any network device with a MAC address starting 30:3F:5D was manufactured by or for PT HAN SUNG ELECTORONICS INDONESIA.