What this means
The IEEE assigned the MA-L block 204181 to ESYSE GmbH Embedded Systems Engineering. 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 20:41:81, it is ESYSE GmbH Embedded Systems Engineering hardware.
Frequently Asked Questions
Who owns MAC prefix 204181?
204181 is registered to ESYSE GmbH Embedded Systems Engineering 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. ESYSE GmbH Embedded Systems Engineering's block covers 16,777,216 addresses.
What devices use 204181?
Any network device with a MAC address starting 20:41:81 was manufactured by or for ESYSE GmbH Embedded Systems Engineering.