GMK electronic design GmbH

Any device whose MAC address begins with 00:25:F9 has a network interface built by GMK electronic design 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

00:25:F9

Organization

GMK electronic design GmbH

Address

Daimlerstraße 8 Wernberg-Koeblitz Bavaria DE D-92533

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.