R&M AG

Any device whose MAC address begins with 34:4F:5C has a network interface built by R&M AG. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

34:4F:5C

Organization

R&M AG

Address

Binzstrasse 32 Wetzikon Zurich CH 8620

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.