Raydium Semiconductor Corp.

Any device whose MAC address begins with 30:D9:41 has a network interface built by Raydium Semiconductor Corp.. 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:D9:41

Organization

Raydium Semiconductor Corp.

Address

2F, No. 23, LiHsin Rd., Hsinchu Science Park Hsinchu, Taiwan, R.O.C. TW TW 300

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.