TAC Inc.

Any device whose MAC address begins with 00:18:5F has a network interface built by TAC 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

00:18:5F

Organization

TAC Inc.

Address

66 Nishiishigatsubocho Nishinanajyo Shimogyoku Kyoto JP 600-8896

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.