EMH Energiemesstechnik GmbH

Any device whose MAC address begins with 00:1F:58 has a network interface built by EMH Energiemesstechnik 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

00:1F:58

Organization

EMH Energiemesstechnik GmbH

Address

Vor dem Hassel 2 Brackel DE 21438

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.