Beijing Siasun Electronic System Co.,Ltd.

Any device whose MAC address begins with 00:23:66 has a network interface built by Beijing Siasun Electronic System 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

00:23:66

Organization

Beijing Siasun Electronic System Co.,Ltd.

Address

Rm.1018 Huatian Bldg, No.6 Bei Xiaomachang Beijing CN 100038

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.