University of Oklahoma

Any device whose MAC address begins with E4:3C:80 has a network interface built by University of Oklahoma. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

E4:3C:80

Organization

University of Oklahoma

Address

Advanced Radar Research Center Norman OK US 73019

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.