K40 Electronics

Any device whose MAC address begins with 00:14:74 has a network interface built by K40 Electronics. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:14:74

Organization

K40 Electronics

Address

600 Tollgate Rd. Unit A Elgin IL US 60123

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.