x-fabric GmbH

Any device whose MAC address begins with 04:EE:91 has a network interface built by x-fabric GmbH. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

04:EE:91

Organization

x-fabric GmbH

Address

Nachodstraße 7 Berlin DE 10779

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.