SAMWONFA Co.,Ltd.

Any device whose MAC address begins with A0:40:41 has a network interface built by SAMWONFA Co.,Ltd.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

A0:40:41

Organization

SAMWONFA Co.,Ltd.

Address

470-5, Moonhyun2-Dong Busan KR 608-042

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.