Cargt Holdings LLC

Any device whose MAC address begins with 34:5C:40 has a network interface built by Cargt Holdings LLC. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

34:5C:40

Organization

Cargt Holdings LLC

Address

8820 Hillside Dr Lenexa KANSAS (KS) US 66227

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.