TeraNXT Global India Pvt Ltd.

Any device whose MAC address begins with 40:BB:56 has a network interface built by TeraNXT Global India Pvt Ltd.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

40:BB:56

Organization

TeraNXT Global India Pvt Ltd.

Address

7A/61 W.E.A KAROL BAGH DELHI DELHI IN 110005

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.