Zero One Technology Co. Ltd.

Any device whose MAC address begins with 00:40:01 has a network interface built by Zero One Technology Co. Ltd.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:40:01

Organization

Zero One Technology Co. Ltd.

Address

10 Fl., No. 8, Lane 360, Sec 1, Neihu Dist., Taipei City TW 114

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.