What this means
The IEEE assigned the MA-L block 00509A to TAG ELECTRONIC SYSTEMS. 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 00:50:9A, it is TAG ELECTRONIC SYSTEMS hardware.
Frequently Asked Questions
Who owns MAC prefix 00509A?
00509A is registered to TAG ELECTRONIC SYSTEMS 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. TAG ELECTRONIC SYSTEMS's block covers 16,777,216 addresses.
What devices use 00509A?
Any network device with a MAC address starting 00:50:9A was manufactured by or for TAG ELECTRONIC SYSTEMS.