KUK JE TONG SHIN Co.,LTD

Any device whose MAC address begins with 00:21:25 has a network interface built by KUK JE TONG SHIN 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

00:21:25

Organization

KUK JE TONG SHIN Co.,LTD

Address

476-3 Incheon Kwangyouk-Si KR 407-060

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.