Stephen Technologies Co.,Limited

Any device whose MAC address begins with 78:30:3B has a network interface built by Stephen Technologies Co.,Limited. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

78:30:3B

Organization

Stephen Technologies Co.,Limited

Address

5/F, Building NO.1, TongXin Industry Zone Shenzhen Guangdong CN 518115

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.