IGRS Engineering Lab Ltd.

Any device whose MAC address begins with D4:3A:65 has a network interface built by IGRS Engineering Lab 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

D4:3A:65

Organization

IGRS Engineering Lab Ltd.

Address

8F,Taipeng Mansion Haidian District Beijing CN 10000

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.