AC&T SYSTEM CO., LTD.

Any device whose MAC address begins with 00:30:BA has a network interface built by AC&T SYSTEM 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

00:30:BA

Organization

AC&T SYSTEM CO., LTD.

Address

ROOM 702, KEUM-WHA PLAZA 435-040 SOUTH KR KOREA

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.