What this means
The IEEE assigned the MA-L block 747563 to Duke Manufacturing. 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 74:75:63, it is Duke Manufacturing hardware.
Frequently Asked Questions
Who owns MAC prefix 747563?
747563 is registered to Duke Manufacturing 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. Duke Manufacturing's block covers 16,777,216 addresses.
What devices use 747563?
Any network device with a MAC address starting 74:75:63 was manufactured by or for Duke Manufacturing.