Elitegroup Computer Systems Co.,Ltd.

Any device whose MAC address begins with 00:19:21 has a network interface built by Elitegroup Computer Systems 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

00:19:21

Organization

Elitegroup Computer Systems Co.,Ltd.

Address

No.22,Alley 38,Lane 91, Sec. 1,Nei Hu Road. Taipei TW 114

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.