UNISYS

Any device whose MAC address begins with 00:00:3D has a network interface built by UNISYS. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:00:3D

Organization

UNISYS

Address

MS8-010 SAN JOSE CA US 95150-6685

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.