PORTech Communications, Inc.

Any device whose MAC address begins with 00:03:7E has a network interface built by PORTech Communications, Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:03:7E

Organization

PORTech Communications, Inc.

Address

150, Shiang-Shung N. Rd., Taichung Taiwan TW 403, R.O.C.

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.