VisionTek, Inc.

Any device whose MAC address begins with 00:05:3F has a network interface built by VisionTek, Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:05:3F

Organization

VisionTek, Inc.

Address

1175 Lakeside Dr. Gurnee IL US 60031

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.