PLUS-ONE I&T, Inc.

Any device whose MAC address begins with 00:03:8B has a network interface built by PLUS-ONE I&T, Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:03:8B

Organization

PLUS-ONE I&T, Inc.

Address

7F, A-San Venture Tower, 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.