APPLIED SIGNAL TECHNOLOGY

Any device whose MAC address begins with 00:20:97 has a network interface built by APPLIED SIGNAL TECHNOLOGY. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:20:97

Organization

APPLIED SIGNAL TECHNOLOGY

Address

160 SOBRANTE WAY SUNNYVALE CA US 94086

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.