SYGN HOUSE INC.

Any device whose MAC address begins with A0:C4:A5 has a network interface built by SYGN HOUSE INC.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

A0:C4:A5

Organization

SYGN HOUSE INC.

Address

2-9-14 Tamagawa-denenchofu Setagaya-ku Tokyo JP 1580085

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.