Techno Valley, Inc.

Any device whose MAC address begins with 00:05:D9 has a network interface built by Techno Valley, 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

00:05:D9

Organization

Techno Valley, Inc.

Address

ASIC Venture Town 5F, Seoul KR 135-072

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.