TECSEN

Any device whose MAC address begins with 70:DA:9C has a network interface built by TECSEN. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

70:DA:9C

Organization

TECSEN

Address

$401, Jeongsu Bd, 94-70, SEOUL NA KR 150-037

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.