HWA JIN T&I Corp.

Any device whose MAC address begins with 00:21:67 has a network interface built by HWA JIN T&I Corp.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:21:67

Organization

HWA JIN T&I Corp.

Address

5F., SEHWA Bldg 164-24, Poi-dong, Gangnam-gu, Seoul, Korea Gangnam-gu Seoul KR 135-960

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.