What this means
The IEEE assigned the MA-L block 4C804F to Armstrong Monitoring Corp. 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 4C:80:4F, it is Armstrong Monitoring Corp hardware.
Frequently Asked Questions
Who owns MAC prefix 4C804F?
4C804F is registered to Armstrong Monitoring Corp 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. Armstrong Monitoring Corp's block covers 16,777,216 addresses.
What devices use 4C804F?
Any network device with a MAC address starting 4C:80:4F was manufactured by or for Armstrong Monitoring Corp.