Frequentis

Any device whose MAC address begins with 00:01:BB has a network interface built by Frequentis. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:01:BB

Organization

Frequentis

Address

SPITTELBREITENGASSE 34 AT

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.