What this means
The IEEE assigned the MA-L block A8D409 to USA 111 Inc. 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 A8:D4:09, it is USA 111 Inc hardware.
Frequently Asked Questions
Who owns MAC prefix A8D409?
A8D409 is registered to USA 111 Inc 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. USA 111 Inc's block covers 16,777,216 addresses.
What devices use A8D409?
Any network device with a MAC address starting A8:D4:09 was manufactured by or for USA 111 Inc.