UUNET TECHNOLOGIES, INC.

Any device whose MAC address begins with 00:C0:87 has a network interface built by UUNET TECHNOLOGIES, 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:C0:87

Organization

UUNET TECHNOLOGIES, INC.

Address

3110 FAIRVIEW PARK DR. #570 FALLS CHURCH VA US 22042

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.