Cheng Hongjian

Any device whose MAC address begins with 00:19:86 has a network interface built by Cheng Hongjian. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:19:86

Organization

Cheng Hongjian

Address

Rm.2305B.Sege Plaza,Huaqiang North Rd., Shenzhen Guangdong US 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.