Brandywine Communications

Any device whose MAC address begins with 00:21:34 has a network interface built by Brandywine Communications. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:21:34

Organization

Brandywine Communications

Address

1153 Warner Ave Tustin CA US 92780

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.