Annapurna labs

Any device whose MAC address begins with 28:87:5F has a network interface built by Annapurna labs. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

28:87:5F

Organization

Annapurna labs

Address

Matam Scientific Industries Center, Building 8.2 Mail box 15123 Haifa IL 3508409

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.