UMB Communications Co., Ltd.

Any device whose MAC address begins with 00:19:38 has a network interface built by UMB Communications 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

00:19:38

Organization

UMB Communications Co., Ltd.

Address

1010, 5, ACE Techno Tower, 197-22, Guro-dong, Guro-gu Seoul KR 151-766

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.