Shenzhen Yourf Kwan Industrial Co., Ltd

Any device whose MAC address begins with 40:9B:0D has a network interface built by Shenzhen Yourf Kwan Industrial 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

40:9B:0D

Organization

Shenzhen Yourf Kwan Industrial Co., Ltd

Address

MCN Edifice 5D, R1 Building, No.21 4th Hi-tech Road South, High-tech Industrial Park(south) Shenzhen Guangdong CN 518057

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.