TJK Tietolaite Oy

Any device whose MAC address begins with CC:6D:EF has a network interface built by TJK Tietolaite Oy. 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:6D:EF

Organization

TJK Tietolaite Oy

Address

PL 443 Vaasa FI 65101

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.