MICROTEST, INC.

Any device whose MAC address begins with 00:80:A1 has a network interface built by MICROTEST, 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

00:80:A1

Organization

MICROTEST, INC.

Address

4747 N. 22ND STREET PHOENIX AZ US 85016-4708

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.