What this means
The IEEE assigned the MA-L block 404AD4 to Widex A/S. 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 40:4A:D4, it is Widex A/S hardware.
Frequently Asked Questions
Who owns MAC prefix 404AD4?
404AD4 is registered to Widex A/S 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. Widex A/S's block covers 16,777,216 addresses.
What devices use 404AD4?
Any network device with a MAC address starting 40:4A:D4 was manufactured by or for Widex A/S.