w5networks

Any device whose MAC address begins with 00:18:20 has a network interface built by w5networks. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:18:20

Organization

w5networks

Address

48389 Fremont Blvd Fremont CA US 94538

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.