What this means
The IEEE assigned the MA-L block 04D783 to Y&H E&C 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 04:D7:83, it is Y&H E&C Co.,LTD. hardware.
Frequently Asked Questions
Who owns MAC prefix 04D783?
04D783 is registered to Y&H E&C 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. Y&H E&C Co.,LTD.'s block covers 16,777,216 addresses.
What devices use 04D783?
Any network device with a MAC address starting 04:D7:83 was manufactured by or for Y&H E&C Co.,LTD..