SHOWA ELECTRIC WIRE & CABLE CO

Any device whose MAC address begins with 00:20:16 has a network interface built by SHOWA ELECTRIC WIRE & CABLE CO. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:20:16

Organization

SHOWA ELECTRIC WIRE & CABLE CO

Address

NO. 20-25, SEISHIN 8-CHOME 229 JP

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.