IEIT SYSTEMS Co., Ltd.

Any device whose MAC address begins with B4:05:5D has a network interface built by IEIT SYSTEMS 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

B4:05:5D

Organization

IEIT SYSTEMS Co., Ltd.

Address

No 224 Shanda Road Jinan Shandong CN 250013

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.