VSSL

Any device whose MAC address begins with 9C:3B:91 has a network interface built by VSSL. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

9C:3B:91

Organization

VSSL

Address

192 North Old Highway 91, Building 1 Hurricane UT US 84737

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.