this is engineering Inc.

Any device whose MAC address begins with 74:34:AE has a network interface built by this is engineering 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

74:34:AE

Organization

this is engineering Inc.

Address

352, 815 Daewangpangyo-ro, Sujeong-gu Seongnam-si Gyeonggi-do KR 13449

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.