Kolff Computer Supplies b.v.

Any device whose MAC address begins with 7C:C6:C4 has a network interface built by Kolff Computer Supplies b.v.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

7C:C6:C4

Organization

Kolff Computer Supplies b.v.

Address

Kuipershaven 22 Dordrecht Zuid-Holland NL 3311 AL

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.