Millinet Co., Ltd.

Any device whose MAC address begins with 00:21:51 has a network interface built by Millinet 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

00:21:51

Organization

Millinet Co., Ltd.

Address

2F, West Building, IT Venture Tower, 78, Garakbon-Dong Songpa-gu Seoul US 138-803

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.