Advanced Technology & Systems

Any device whose MAC address begins with 00:30:7A has a network interface built by Advanced Technology & Systems. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:30:7A

Organization

Advanced Technology & Systems

Address

Yokohama Business Park East Tower 9F, JP 240-0005

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.