U.S. ROBOTICS, INC.

Any device whose MAC address begins with 00:C0:49 has a network interface built by U.S. ROBOTICS, 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:C0:49

Organization

U.S. ROBOTICS, INC.

Address

8100 NORTH MCCORMICK BLVD. SKOKIE IL US 60076-2999

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.