What this means
The IEEE assigned the MA-L block 0090B8 to ROHDE & SCHWARZ GMBH & CO. KG. 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 00:90:B8, it is ROHDE & SCHWARZ GMBH & CO. KG hardware.
Frequently Asked Questions
Who owns MAC prefix 0090B8?
0090B8 is registered to ROHDE & SCHWARZ GMBH & CO. KG 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. ROHDE & SCHWARZ GMBH & CO. KG's block covers 16,777,216 addresses.
What devices use 0090B8?
Any network device with a MAC address starting 00:90:B8 was manufactured by or for ROHDE & SCHWARZ GMBH & CO. KG.