Testech Electronics Pte Ltd

Any device whose MAC address begins with 00:27:03 has a network interface built by Testech Electronics 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

00:27:03

Organization

Testech Electronics Pte Ltd

Address

Block 118, #05-110, Singapore SG 380118

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.