Tianyi Telecom Terminals Company Limited

Any device whose MAC address begins with 54:08:D3 has a network interface built by Tianyi Telecom Terminals Company Limited. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

54:08:D3

Organization

Tianyi Telecom Terminals Company Limited

Address

12-19 floors inside 101, Floor 4-33, Building 1, Yard 1, Fenghuang Zui Street, Fengtai District, Beijing Beijing CN 100073

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.