Honeywell Environmental & Combustion Controls (Tianjin) Co., Ltd.

Any device whose MAC address begins with DC:B3:B4 has a network interface built by Honeywell Environmental & Combustion Controls (Tianjin) 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

DC:B3:B4

Organization

Honeywell Environmental & Combustion Controls (Tianjin) Co., Ltd.

Address

158 Nan Hai Road, TEDA Tianjin CN 300457

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.