Guangzhou Trustmo Information System Co.,LTD

Any device whose MAC address begins with 48:09:51 has a network interface built by Guangzhou Trustmo Information 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

48:09:51

Organization

Guangzhou Trustmo Information System Co.,LTD

Address

19th Floor, No.123 Tiyu West Road, Tianhe District, Guangzhou City,Guangdong P.R. China Guangzhou Guangdong CN 510000

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.