What this means
The IEEE assigned the MA-L block 78C40E to H&D Wireless. 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 78:C4:0E, it is H&D Wireless hardware.
Frequently Asked Questions
Who owns MAC prefix 78C40E?
78C40E is registered to H&D Wireless 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. H&D Wireless's block covers 16,777,216 addresses.
What devices use 78C40E?
Any network device with a MAC address starting 78:C4:0E was manufactured by or for H&D Wireless.