WEARNES AUTOMATION PTE LTD

Any device whose MAC address begins with 00:40:78 has a network interface built by WEARNES AUTOMATION PTE 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

00:40:78

Organization

WEARNES AUTOMATION PTE LTD

Address

801 LORONG 7, TOA PAYOH SINGAPORE SG 1231

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.