IO-Power Technology Co., Ltd.

Any device whose MAC address begins with 34:4F:3F has a network interface built by IO-Power Technology 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

34:4F:3F

Organization

IO-Power Technology Co., Ltd.

Address

1F., No.100, Hsinchu City TW 30055

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.