YuHua TelTech (ShangHai) Co., Ltd.

Any device whose MAC address begins with 00:19:65 has a network interface built by YuHua TelTech (ShangHai) 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

00:19:65

Organization

YuHua TelTech (ShangHai) Co., Ltd.

Address

YuHua R&D Building,27 xin jin qiao road, SHANGHAI CN 201206

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.