SG Wireless Limited

Any device whose MAC address begins with 7C:51:89 has a network interface built by SG Wireless 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

7C:51:89

Organization

SG Wireless Limited

Address

RM 504 5/F Sun Fung Industrial Building 8-12 Ma Kok Street Tsuen Wan HK NA

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.