IEEE Registration Authority

Any device whose MAC address begins with 18:9B:A5 has a network interface built by IEEE Registration Authority. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

18:9B:A5

Organization

IEEE Registration Authority

Address

445 Hoes Lane Piscataway NJ US 08554

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.