Walnut Media Network

Any device whose MAC address begins with 00:25:A5 has a network interface built by Walnut Media Network. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:25:A5

Organization

Walnut Media Network

Address

440 N Wolfe Rd Sunnyvale CA US 94085

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.