Landis+Gyr Ltd.

Any device whose MAC address begins with 00:0F:93 has a network interface built by Landis+Gyr Ltd.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:0F:93

Organization

Landis+Gyr Ltd.

Address

Feldstrasse 1 Zug CH CH-6301

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.