What this means
The IEEE assigned the MA-L block 0040AA to Valmet Automation. 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 00:40:AA, it is Valmet Automation hardware.
Frequently Asked Questions
Who owns MAC prefix 0040AA?
0040AA is registered to Valmet Automation 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. Valmet Automation's block covers 16,777,216 addresses.
What devices use 0040AA?
Any network device with a MAC address starting 00:40:AA was manufactured by or for Valmet Automation.