GRT

Any device whose MAC address begins with B0:6B:B3 has a network interface built by GRT. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

B0:6B:B3

Organization

GRT

Address

Unit 01, 10/F Carnival Comm BLDG 18 Java RD,North Point, Hong Kong Hong Kong HK 100036

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.