Ennoconn Corporation.

Any device whose MAC address begins with 30:50:F1 has a network interface built by Ennoconn Corporation.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

30:50:F1

Organization

Ennoconn Corporation.

Address

3-6F,No.10,JiangKang Rd.,Zhonghe Dist.,New Taipei City 23586,Taiwan TaiPei Taiwan TW 23586

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.