What this means
The IEEE assigned the MA-L block 40DDD1 to Beautiful Card Corporation. 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:DD:D1, it is Beautiful Card Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 40DDD1?
40DDD1 is registered to Beautiful Card Corporation 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. Beautiful Card Corporation's block covers 16,777,216 addresses.
What devices use 40DDD1?
Any network device with a MAC address starting 40:DD:D1 was manufactured by or for Beautiful Card Corporation.