UNICARD SA

Any device whose MAC address begins with 34:81:37 has a network interface built by UNICARD SA. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

34:81:37

Organization

UNICARD SA

Address

UL.WADOWICKA 12 KRAKOW woj. malopolskie PL 30-415

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.