Information System Research Institute,Inc.

Any device whose MAC address begins with CC:5D:57 has a network interface built by Information System Research Institute,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:5D:57

Organization

Information System Research Institute,Inc.

Address

Metro city minamiikebukuro-bldg.5F Toshima-ku Tokyo JP 171-0022

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.