Chipsea Technologies (Shenzhen) Crop.

Any device whose MAC address begins with 78:66:A5 has a network interface built by Chipsea Technologies (Shenzhen) Crop.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

78:66:A5

Organization

Chipsea Technologies (Shenzhen) Crop.

Address

Room 301, Building 1, Shenzhen Bay Innovation and Technology Center, Keyuan Avenue, High-tech Zone Community, Yuehai Subdistrict, Nanshan District, Shenzhen Shenzhen CN 518000

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.