YUSUR Technology Co., Ltd.

Any device whose MAC address begins with 74:3E:39 has a network interface built by YUSUR Technology 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

74:3E:39

Organization

YUSUR Technology Co., Ltd.

Address

Room 1401,building 4,yard 1, Beiqing Road No.81, Haidian District Beijing Beijing CN 100086

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.