Owl Cyber Defense Solutions, LLC

Any device whose MAC address begins with 5C:90:12 has a network interface built by Owl Cyber Defense Solutions, LLC. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

5C:90:12

Organization

Owl Cyber Defense Solutions, LLC

Address

38A Grove Street Ridgefield CT US 06877

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.