NST Co., LTD

Any device whose MAC address begins with 30:52:5A has a network interface built by NST 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

30:52:5A

Organization

NST Co., LTD

Address

RM301,Daeryung Techno Town 2, 569-21 Seoul KR 153-771

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.