SM Information & Communication

Any device whose MAC address begins with 00:05:77 has a network interface built by SM Information & Communication. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:05:77

Organization

SM Information & Communication

Address

330-1 Yangjaedong KR 137-130

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.