ROHDE & SCHWARZ GMBH & CO. KG

Any device whose MAC address begins with 00:90:B8 has a network interface built by ROHDE & SCHWARZ GMBH & CO. KG. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:90:B8

Organization

ROHDE & SCHWARZ GMBH & CO. KG

Address

POSTFACH: 80 14 69/ABT.: 3CK D-81614 MUNCHEN DE

Source

IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.