WEG

Any device whose MAC address begins with 38:31:AC has a network interface built by WEG. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

38:31:AC

Organization

WEG

Address

Av. Pref. Waldemar Grubba, 3000 Jaraguá do Sul Santa Catarina BR 89256-900

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.