Mobilink Telecom Co.,Ltd

Any device whose MAC address begins with 00:21:A9 has a network interface built by Mobilink Telecom 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:A9

Organization

Mobilink Telecom Co.,Ltd

Address

292-3 Sindang-ri, Sandong-myun Gumi Gyeongbuk KR 730-853

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.