What this means
The IEEE assigned the MA-L block 00005B to ELTEC ELEKTRONIK 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 00:00:5B, it is ELTEC ELEKTRONIK AG hardware.
Frequently Asked Questions
Who owns MAC prefix 00005B?
00005B is registered to ELTEC ELEKTRONIK 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. ELTEC ELEKTRONIK AG's block covers 16,777,216 addresses.
What devices use 00005B?
Any network device with a MAC address starting 00:00:5B was manufactured by or for ELTEC ELEKTRONIK AG.