STB Datenservice GmbH

Any device whose MAC address begins with 00:12:8D has a network interface built by STB Datenservice 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

00:12:8D

Organization

STB Datenservice GmbH

Address

Weinsbergstraße 190 Köln NRW DE 50825

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.