What this means
The IEEE assigned the MA-M block 300A604 to AVIC JONHON OPTRONIC 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 30:0A:60:4, it is AVIC JONHON OPTRONIC TECHNOLOGY CO., LTD. hardware.
Frequently Asked Questions
Who owns MAC prefix 300A604?
300A604 is registered to AVIC JONHON OPTRONIC TECHNOLOGY CO., LTD. in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. AVIC JONHON OPTRONIC TECHNOLOGY CO., LTD.'s block covers 1,048,576 addresses.
What devices use 300A604?
Any network device with a MAC address starting 30:0A:60:4 was manufactured by or for AVIC JONHON OPTRONIC TECHNOLOGY CO., LTD..