Dongseo system.

Any device whose MAC address begins with 00:17:5D has a network interface built by Dongseo system.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:17:5D

Organization

Dongseo system.

Address

974-21 Mansu-dong Namdong-gu Incheon In-Cheon KR 405-865

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.