What this means
The IEEE assigned the MA-L block 0003EF to Oneline AG. 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 00:03:EF, it is Oneline AG hardware.
Frequently Asked Questions
Who owns MAC prefix 0003EF?
0003EF is registered to Oneline AG 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. Oneline AG's block covers 16,777,216 addresses.
What devices use 0003EF?
Any network device with a MAC address starting 00:03:EF was manufactured by or for Oneline AG.