J & F Labs

Any device whose MAC address begins with 00:25:79 has a network interface built by J & F 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

00:25:79

Organization

J & F Labs

Address

1214 W. Boston Post Road Mamaroneck NY US 10543

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.