Sur-Gard Security

Any device whose MAC address begins with 00:03:4F has a network interface built by Sur-Gard Security. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:03:4F

Organization

Sur-Gard Security

Address

401 Magnetic Drive Ontario CA M3J 3H9

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.