DCTRI

Any device whose MAC address begins with 00:50:90 has a network interface built by DCTRI. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:50:90

Organization

DCTRI

Address

NO.40 XUE YUAN RD CN

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.