SIS Sat Internet Services GmbH

Any device whose MAC address begins with 28:E6:E9 has a network interface built by SIS Sat Internet Services 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

28:E6:E9

Organization

SIS Sat Internet Services GmbH

Address

Justus-von-Liebig Str. 26 Neustadt Niedersachsen DE 31535

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.