Beijing HuaDa ZhiBao Electronic System Co.,Ltd.

Any device whose MAC address begins with D4:74:1B has a network interface built by Beijing HuaDa ZhiBao Electronic 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

D4:74:1B

Organization

Beijing HuaDa ZhiBao Electronic System Co.,Ltd.

Address

No.1 Gaojiayuan,Chaoyang District,Beijing,China Beijing Beijing CN 100015

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.