Curiouser Products Inc

Any device whose MAC address begins with CC:3B:58 has a network interface built by Curiouser Products 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

CC:3B:58

Organization

Curiouser Products Inc

Address

712 Broadway #4 New York NY US 10003

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.