What this means
The IEEE assigned the MA-L block 5091E3 to TP-Link Systems 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 50:91:E3, it is TP-Link Systems Inc hardware.
Frequently Asked Questions
Who owns MAC prefix 5091E3?
5091E3 is registered to TP-Link Systems 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. TP-Link Systems Inc's block covers 16,777,216 addresses.
What devices use 5091E3?
Any network device with a MAC address starting 50:91:E3 was manufactured by or for TP-Link Systems Inc.