Protempis, LLC

Any device whose MAC address begins with C4:7B:80 has a network interface built by Protempis, 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

C4:7B:80

Organization

Protempis, LLC

Address

3333 Warrenville Road, Ste 200 Lisle IL US 60532-1999

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.