Shenzhen Sanland Electronic Co., ltd.

Any device whose MAC address begins with C4:91:3A has a network interface built by Shenzhen Sanland Electronic 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

C4:91:3A

Organization

Shenzhen Sanland Electronic Co., ltd.

Address

3 floor,Block D, Glory Technology Industrial Park, ShenZhen Guangdong CN 518116

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.