CSS LABS

Any device whose MAC address begins with 00:00:38 has a network interface built by CSS LABS. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:00:38

Organization

CSS LABS

Address

2134 SOUTH RIPCHEY SANTA ANA CA US 92705

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.