Category Solutions, Inc

Any device whose MAC address begins with 00:11:87 has a network interface built by Category Solutions, 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

00:11:87

Organization

Category Solutions, Inc

Address

1021 W. Adams St Chicago IL US 60607

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.