S-Information Technolgy, Co., Ltd.

Any device whose MAC address begins with 00:19:E9 has a network interface built by S-Information Technolgy, 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

00:19:E9

Organization

S-Information Technolgy, Co., Ltd.

Address

Sungwoo Bldg, 717-3 Suseo-dong, Seoul KR 135-884

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.